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100,000 WHYs kids encyclopedia book with colorful illustrations
100,000 WHYs kids encyclopedia book cover with colorful cartoon illustrations
100,000 WHYs kids encyclopedia interior pages with illustrated science questions
100,000 WHYs kids encyclopedia book angled cover with colorful illustrations
100,000 WHYs kids encyclopedia interior pages about plants and trains
100,000 WHYs kids encyclopedia for cognitive development, curiosity and thinking skills
100,000 WHYs kids encyclopedia covering six major themes of science and knowledge
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Grandparents are ordering 5+ at a time

BEST QUALITY

Kids Encyclopedia "100,000 WHYs" – Unlock Your Child's Full Potential

4.95200+ Happy Parents
$39.90$79.8050% OFF

You save $39.90 today

WHY PARENTS SEE THE VALUE

More than a children's book — a curiosity-filled learning adventure kids can keep exploring.

12+ fascinating topics Comic-style illustrations Builds curiosity & critical thinking Designed for ages 4–12
EXTRA 10% OFFEnter your email in the pop-up to unlock your code
  • Turns endless “WHY?” questions into exciting learning adventures
  • Builds curiosity, critical thinking & independent thinking
  • Makes science and everyday knowledge genuinely fun to explore
  • A screen-free way to keep curious minds engaged
  • Sparks meaningful conversations between kids and parents

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4.95200+ Happy Parents
“My daughter absolutely loves exploring the questions in this book. It has turned quiet reading time into something she genuinely looks forward to.”
Sophie M. Sophie M. Verified CustomerSeattle, USA
“Such a fun way to encourage children to ask questions and think beyond the obvious. My son keeps coming back to different sections.”
Henry R. Henry R. Verified CustomerMelbourne, Australia
“The variety of topics is fantastic. One minute we’re talking about space and the next we’re discussing animals or the human body.”
Yvette S. Yvette S. Verified CustomerBirmingham, UK
Kids Encyclopedia "100,000 WHYs" – Unlock Your Child's Full Potential
REAL MOMENTS. REAL LITTLE READERS.

We Asked. Our Little Readers Answered.

We asked WonderNest families to share their little reader’s reaction — here are some of the moments they sent us.

REAL REACTION

We Told Him to React… 😂

“We told him to react for a video, and this is exactly how he reacted. 😂 He really loved the book!”

Noah, Age 6 · Chicago, Illinois, USA
REAL REACTION

The Best Christmas Surprise ❤️

“He opened it on Christmas morning and immediately wanted to look through it. He’s been asking questions ever since!”

Ethan, Age 6 · California, USA
REAL REACTION

She Already Loves It! ❤️

“I ordered 2 for my kids, and the little one already loves it!”

Sophie, Age 5 · Texas, USA
THE PROBLEM WITH TRADITIONAL LEARNING

Why Most Educational Books Fail to Build Curious Minds

That's exactly why we created 100,000 WHYs.
Instead of teaching kids what to think, we inspire them to ask questions, explore ideas, and truly love learning.

01

Keeps Their “Why?” Habit Alive

Most books simply provide facts instead of encouraging curiosity. Children memorize information but rarely develop the habit of asking meaningful questions.

02

Boring Books Never Get Finished

When a book feels like homework, children lose interest after just a few pages. Learning stops the moment reading becomes boring.

03

They Kill the 'WHY' Habit

Children naturally ask 'Why?' every day. Most books answer 'What?' instead, leaving curiosity unexplored and limiting critical thinking.

04

No Stories. No Emotion. No Memory.

Facts alone are easy to forget. Kids remember adventures, characters and exciting discoveries that make learning meaningful.

05

Screens Win Every Time

If reading isn't exciting, tablets and video games will always be the easier choice. Books need to compete with entertainment.

Trusted by 15,000+ Parents & Grandparents worldwide

Real Parents. Real Results. More Curious Kids.

See why families are choosing a better way to make learning stick.

92.2%

of parents saw their child ask more curious questions

93.7%

of kids picked the book back up on their own after the first read

96.6%

of parents noticed improved focus and interest in learning

Data collected from a satisfaction survey of verified buyers.

DISCOVER 100,000 WHYs

One Book. Every Subject. Endless Discoveries.

From space and dinosaurs to the human body and the deepest oceans—every page unlocks a new adventure for curious young minds.

01

Space & Universe

Black holes, planets, stars, rockets and life beyond Earth

02

Dinosaurs

How they lived, why they disappeared and what fossils reveal

03

The Human Body

How your heart beats, your brain works and your body grows

04

Oceans & Sea Life

Deep sea creatures, whales, sharks and underwater mysteries

05

Weather & Nature

Thunder, lightning, volcanoes, earthquakes and rainbows

06

History & Civilizations

Ancient Egypt, Rome, inventions and world history

07

Animals & Wildlife

Amazing animals, habitats, survival and adaptation

08

Science & Physics

Gravity, electricity, magnets, light and sound

09

Plants & Biology

How plants grow, flowers bloom and nature survives

10

Brain & Mind

Dreams, emotions, memory and intelligence

11

Technology & Inventions

Computers, AI, robots, internet and future technology

12

Earth & Geography

Countries, mountains, rivers, deserts and our planet

TRUSTED BY REAL PARENTS & GRANDPARENTS

Here is what parents are saying...

Parents are seeing more curiosity, better conversations, and less screen time — all from one book that kids genuinely enjoy reading.

Rachel G.

“My Son Finally Loves Reading.”

“We bought 100,000 WHYs hoping to reduce screen time, but we never expected such a huge change. Within days, our son started asking fascinating questions about space, animals, and science. Now every evening ends with ‘just one more page.’ It has completely transformed how he learns.”
Rachel G. VerifiedCustomer · California, USA
Sarah M., Texas

“Learning Feels Like an Adventure”

“I bought this for my 7-year-old, expecting a few minutes of reading. Instead, he spent the whole evening asking questions about space, dinosaurs, and science. This book made learning feel like an adventure.”

Sarah M., Texas VerifiedTexas
Emily R., California

“Our New Favorite Bedtime Tradition”

“Instead of asking for the iPad, my grandchildren now ask me to read another chapter from this book every night. It's become our favorite bedtime tradition.”

Emily R., California VerifiedCalifornia
Michael D., Florida

“Beautiful, Fun, and Full of Facts”

“Beautiful illustrations, fascinating facts, and questions that actually make children think. Easily one of the best educational books we've ever purchased.”

Michael D., Florida VerifiedFlorida

30-Day Money-Back Guarantee

We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 30 days for a full refund.

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LOVED BY CURIOUS FAMILIES

Big Questions. Curious Minds.

See why families love making curiosity, discovery and learning part of everyday life.

4.9 family rating

Finally found a book that competes with screens

I honestly bought this hoping it would reduce my son's screen time a little. I didn't expect him to start asking questions about planets during dinner. That alone made it worth buying.

LLauren P.Verified buyer

Best birthday gift this year

My granddaughter opened several presents, but this was the one she carried around all afternoon. We read it together before bed.

DDiane M.Verified buyer

Very well made

The hardcover feels premium and the illustrations are beautiful. I only wish there were a few more pages about the ocean.

CChris A.Verified buyer

Grandpa approved

Reading a few pages before bedtime has become our routine. We both look forward to it.

RRobert H.Verified buyer

Perfect for my classroom

I'm a third-grade teacher and my students keep picking this book from the reading corner.

EEmily S.Verified buyer

Worth every evening

My daughter now asks for this instead of another cartoon before bed.

AAmanda L.Verified buyer

Actually keeps attention

Most educational books last ten minutes here. This one stayed open for almost an hour.

NNathan C.Verified buyer

Wonderful gift

Bought it for my grandson. He called me the next day just to tell me his favorite facts.

PPatricia G.Verified buyer

Beautiful quality

Pages are thick, colors are vibrant, and the content is engaging.

OOlivia R.Verified buyer

Good purchase

Interesting facts and easy enough to read together.

JJames W.Verified buyer

Family favorite

Even my older child joins in when we read this.

MMelissa T.Verified buyer

Better than expected

The questions inside really get children thinking.

KKaren D.Verified buyer

Refreshing

Nice to find a book that encourages curiosity instead of more screen time.

AAndrew B.Verified buyer

My niece loved it

She kept saying one more page before bedtime.

SSophia M.Verified buyer

Excellent gift idea

This is now my go-to birthday present for kids.

GGrace H.Verified buyer

Good value

The quality matches the price. Happy with the purchase.

DDaniel F.Verified buyer

Lovely illustrations

Colorful without being overwhelming.

EEmma J.Verified buyer

Fun and educational

Didn't feel like homework at all.

RRyan K.Verified buyer

Great conversation starter

Every chapter leads to another question from my kids.

VVictoria L.Verified buyer

Very happy

Exactly what I was looking for.

BBrian C.Verified buyer

Homeschool win

Fits perfectly into our weekly science lessons.

RRachel N.Verified buyer

Kept both kids interested

Not easy with an age gap, but they both enjoyed it.

LLaura P.Verified buyer

Highly recommend

One of the few books my son asks to reread.

MMichael D.Verified buyer

Thoughtful content

A nice mix of learning and fun.

HHannah W.Verified buyer

Would buy again

Already ordered another copy as a gift.

JJennifer E.Verified buyer

A bedtime tradition now

This started as a random purchase and somehow became part of our nightly routine. My youngest always asks for one more fact before lights out.

MMegan C.Verified buyer

A gift that actually gets used

Most gifts end up forgotten after a week. This one is still on the coffee table getting picked up every day.

PPeter W.Verified buyer

My twins both enjoy it

Finding something that keeps both of them interested isn't easy. This did.

CClaire H.Verified buyer

Solid purchase

The content is interesting and the book feels durable. I just wish there were a few more pages.

TThomas G.Verified buyer

My nephew surprised me

He called to tell me about volcanoes after finishing a chapter. That phone call made my day.

JJulie N.Verified buyer

Exactly what I hoped for

Fun enough for children but still teaches something on every page.

SSusan K.Verified buyer

Better than another toy

I'd rather give something they'll remember. This was the right choice.

OOliver B.Verified buyer

Great for rainy afternoons

We've spent two weekends reading this together with hot chocolate. Lovely experience.

LLinda R.Verified buyer

Good quality printing

Pages are thick, colors are bright, and nothing feels cheap.

AAaron M.Verified buyer

For my granddaughter

She now wants to visit the library to learn even more. That's a win in my book.

RRebecca F.Verified buyer

Happy with it

Interesting topics and easy to read aloud.

MMark T.Verified buyer

Didn't expect this reaction

My daughter immediately started asking if we could do science experiments at home.

NNatalie S.Verified buyer

Grandfather review

I enjoy reading this almost as much as my grandson does.

GGeorge L.Verified buyer

Beautifully presented

Looks like a premium book and feels like one too.

CCheryl P.Verified buyer

Worth keeping

This is the type of book children come back to instead of reading once.

SScott D.Verified buyer

Homeschool helper

I've been using a few pages each week during our lessons.

AAlice J.Verified buyer

Nice balance

Educational but still entertaining.

KKevin R.Verified buyer

Excellent choice

Bought one for each of my grandchildren after seeing the first copy.

DDonna W.Verified buyer

A thoughtful present

Perfect for curious children who always ask 'why?'

EEvelyn C.Verified buyer

Happy customer

Delivery was smooth and the book arrived in great condition.

SSean H.Verified buyer

Dinner table conversations

The questions don't stop once the book closes, and I love that.

BBeth A.Verified buyer

Refreshing to see

It's nice finding something that encourages imagination instead of endless scrolling.

HHarold P.Verified buyer

My son keeps revisiting it

He's already gone back to read his favorite sections again.

IIsabella Y.Verified buyer

Very pleased

The illustrations kept my little one engaged from start to finish.

MMonica V.Verified buyer

Would recommend

A meaningful gift for birthdays or holidays.

DDavid E.Verified buyer

My grandson asks for this every visit

He has started keeping a notebook of interesting facts after we read together. I never asked him to do that, he just did it on his own.

JJanet B.Verified buyer

Actually worth buying

There are plenty of children's books out there, but this one keeps the conversation going long after we've closed it.

EEric M.Verified buyer

Great for long flights

Packed it for a family trip and it kept my daughter occupied for most of the journey.

CCarol F.Verified buyer

A small suggestion

Lovely content and beautiful illustrations. I only wish there were a couple more pages about the human body.

SSophie T.Verified buyer

Our evening routine changed

Instead of rushing through bedtime, we now spend a few extra minutes reading and talking.

MMatthew H.Verified buyer

Thoughtful gift

Sent this to my niece. My sister messaged saying it's become her favorite book this month.

AAngela W.Verified buyer

Much better than expected

I bought it because of the reviews. Glad I did.

NNoah R.Verified buyer

Grandma's pick

The questions in this book remind me of the ones my own children used to ask years ago.

BBarbara L.Verified buyer

Encourages curiosity

My son doesn't just read it—he starts asking questions and looking up more information.

LLiam C.Verified buyer

Perfect rainy day activity

We've read sections together all weekend.

OOlive J.Verified buyer

Quality is impressive

The binding feels sturdy and the pages are nice and thick.

HHenry D.Verified buyer

My daughter keeps sharing facts

She tells everyone in the family something new she learned.

LLucy P.Verified buyer

A meaningful purchase

Feels like something that will stay on our bookshelf for years.

PPaul A.Verified buyer

Teacher approved

I've recommended it to several parents from my class.

SSheila G.Verified buyer

Easy to read together

The chapters are a good length for bedtime.

CConnor V.Verified buyer

Nice alternative to toys

Children forget toys quickly. Books like this last much longer.

MMaria N.Verified buyer

Happy with the purchase

Good mix of fun facts and illustrations.

TTrevor S.Verified buyer

Conversation starter

Dinner conversations have become a lot more interesting.

HHelen O.Verified buyer

Bought another copy

One for our house and one for my nephew.

JJack E.Verified buyer

Exactly what we needed

My youngest loves asking questions, so this book fits perfectly.

RRose K.Verified buyer

Impressed

Didn't expect such good print quality.

AAdam Y.Verified buyer

Makes learning enjoyable

It never feels like a lesson.

JJulia C.Verified buyer

Good family book

Both parents and kids get something out of it.

FFrank I.Verified buyer

Wonderful keepsake

I can see us keeping this for years.

KKelly Z.Verified buyer

Highly recommended

A thoughtful book that encourages children to stay curious.

EEleanor M.Verified buyer

A book that keeps giving

Weeks later my grandson still brings this over whenever he visits. That's rare.

CCatherine R.Verified buyer

Money well spent

It has become our weekend reading tradition.

BBen T.Verified buyer

Perfect for curious minds

My daughter loves asking questions and this book gives us so much to talk about.

JJoanne F.Verified buyer

One small wish

Really enjoyed it. I'd love to see a sequel with even more space topics.

GGraham P.Verified buyer

Thoughtful and fun

Educational without feeling too serious.

MMolly E.Verified buyer

From Grandpa

I bought it thinking we'd read a page or two. We usually end up reading much more.

DDennis H.Verified buyer

Wonderful illustrations

The artwork kept my niece engaged from start to finish.

CChloe W.Verified buyer

Refreshing purchase

Nice to see a book that rewards curiosity.

SSimon L.Verified buyer

Birthday success

My grandson told everyone this was his favourite present.

RRita M.Verified buyer

Family reading

Even my oldest joined in although the book wasn't meant for him.

OOscar D.Verified buyer

Quality exceeded expectations

Very sturdy hardcover and vibrant pages.

TTeresa G.Verified buyer

Good value

A meaningful purchase instead of another gadget.

LLuke J.Verified buyer

Great classroom addition

Students keep asking if they can borrow it.

MMonique S.Verified buyer

Worth recommending

Already told two friends about it.

NNeil C.Verified buyer

Bedtime favourite

Our daughter asks for this almost every night.

AAmy V.Verified buyer

Nice balance

Fun facts without overwhelming younger readers.

RRoger B.Verified buyer

Gift with purpose

I wanted something educational that still felt exciting. This delivered.

FFiona K.Verified buyer

Makes kids think

The 'why' questions lead to wonderful conversations.

HHarriet N.Verified buyer

Happy purchase

Exactly as described and beautifully printed.

VVictor A.Verified buyer

My son keeps revisiting it

He notices something new each time.

LLeah P.Verified buyer

Excellent family book

We all end up learning something.

CColin W.Verified buyer

Would buy again

Planning to gift this at Christmas.

BBrenda Y.Verified buyer

Pleasant surprise

Didn't expect such high print quality.

IIan F.Verified buyer

More than a book

It's become an activity we enjoy together.

SStacey O.Verified buyer

Highly satisfied

A thoughtful book every curious child should own.

GGeorge M.Verified buyer