Front cover of 100,000 Whys for Kids by Theo Tolland
Book 1 · The Curious Kids Collectionby Theo Tolland

100,000 Whys for Kids Every “why?” finally answered.

104 of the big questions kids really ask, each on its own full-colour illustrated page, with an answer that grows with your child.

4.3 out of 511 ratings on Amazon
Buy on Amazon · $19.90
  • Myth-busters & quizzes inside
  • Full colour on all 130 pages
  • Ages 5–10

Prices shown were on Amazon.com on October 28, 2026 and may change.

  • 104big questions
  • 24myths busted
  • 130full-colour pages
  • 8worlds to explore
  • 4.3out of 5 on Amazon
Try the book

Kids ask hundreds of questions a day. Press for one.

These are 11 real pages from the book. Every page opens with a myth to bust, and here we've mixed in true facts from the same pages too, so don't just guess False! Then read the answer and the WOW! fact.

Tried 0 of 11 sample pages · Score 0

World 4 — The World OutsidePage 56

THE SKY

True or false?

Why is the sky blue?

The sky is blue because it reflects the ocean.

(Read on to find out!)

The answer

Sunlight scatters, and blue scatters the most!

Sunlight is made of all colors mixed together. When it hits the air, the blue light bounces around the sky more than the others, so blue is what fills your eyes when you look up.

WOW!

On the Moon there’s no air to scatter light, so the sky there looks black even in daytime!

Why it works

Made for the way kids really read

Children don't read an encyclopedia front to back. They flip, land somewhere, read one page and shout the fact across the room. Every page in this book works on its own.

One question per page

Never a wall of text. Each of the 104 questions gets its own big, full-colour page, so kids can open anywhere and dive in.

Three reading levels

A bold answer a 5-year-old gets right away, the real “why” for older readers, and a WOW! fact worth sharing at school tomorrow.

True or false? first

Every question page opens with a statement to test. Kids guess before they read, then find out if they were right.

8 worlds to explore

The journey starts with your child's own body, travels all the way out to the stars, then jumps back in time and into the future.

A Brain Zone in every world

Busted myths and a quick quiz at the end of each world turn reading into a game you can play together.

Big Words I Learned

An illustrated glossary at the back explains the trickiest words in the book, from diaphragm to echolocation.

Page 8 of the book: Hiccups, from World 1, All About Me
One page. Three reading levels.

Little ones stop at the bold answer. Older kids read on.

Tap a step to see how page 8 works. Every page follows the same path.

What's inside

130 pages, packed from cover to cover

  • 104 question pages, one big question on each
  • 8 illustrated world openers, from All About Me to Long Ago & Far Ahead
  • 8 Brain Zones with 24 busted myths and 32 quiz questions
  • Big Words I Learned, an illustrated glossary of tricky words
  • How This Book Works and For Parents & Educators pages
  • A This Book Belongs To page for your child's name
  • A Keep Asking Why! send-off and a first peek at Book 2
Paperback · 130 pages8.5 × 11 in14.1 ozISBN 979-8170405602
The book open at The Ocean and Volcanoes pages
8 worlds to explore

From your own body to the stars, and into the future

Each world opens with its own illustrated page and ends with a Brain Zone. Follow the trail.

  1. Opener page of World 1, All About Me

    World 1 · page 7

    All About Me

    • Why do we get hiccups?
    • Why do I get goosebumps?
    • Why do my fingers get wrinkly in the bath?
  2. Opener page of World 2, Feelings and My Amazing Mind

    World 2 · page 23

    Feelings & My Amazing Mind

    • Why do I dream?
    • Why do I laugh when I'm tickled?
    • Why can't I remember being a baby?
  3. Opener page of World 3, Animals and Creatures

    World 3 · page 37

    Animals & Creatures

    • Why do cats purr?
    • Why are flamingos pink?
    • Why do octopuses have three hearts?
  4. Opener page of World 4, The World Outside

    World 4 · page 55

    The World Outside

    • Why is the sky blue?
    • Why do we see rainbows?
    • Why does thunder come after lightning?
  5. Opener page of World 5, Our Planet Earth

    World 5 · page 69

    Our Planet Earth

    • Why do volcanoes erupt?
    • Why is the ocean salty?
    • Why is Earth round like a ball?
  6. Opener page of World 6, Space and The Stars

    World 6 · page 83

    Space & The Stars

    • Why do stars twinkle?
    • Why is Pluto not a planet anymore?
    • Why does the moon follow me when I walk?
  7. Opener page of World 7, How Things Work

    World 7 · page 99

    How Things Work

    • Why does popcorn pop?
    • Why do boats float but rocks sink?
    • Why do airplanes stay up in the sky?
  8. Opener page of World 8, Long Ago and Far Ahead

    World 8 · page 115

    Long Ago & Far Ahead

    • Why did the dinosaurs disappear?
    • Why did knights wear armor?
    • Why will robots help us in the future?
Look inside

Tap a page to read it up close.

Watch the pages turn

A 27-second look inside: page spreads from four worlds, a reader at home, a Brain Zone and the cover.

See it on Amazon

130 pages. Full colour on every one.

Every page of the book, from the title page to the last.

Free printable

24 Myth-Buster Cards for your family

Print them, cut them out and play True or False? at home. Every card comes from the book, with a scoreboard, a certificate to color and 4 real pages.

Admit one curious family

Free · for grown-ups

Your cards are ready, friend!

Download the cards (PDF)

You're on the Curious Kids list: you'll hear first when Book 2 is out.

Ask a grown-up!

The free cards are for grown-ups. A parent or guardian can get them on this page.

Real reviews

What families are saying

A selection of 5-star reviews from verified Amazon.com purchases, quoted as written. Read all reviews on Amazon, including the critical ones.

My kids can't stop asking to read it!

This encyclopedia has become a bedtime favorite at our house. The full-colour illustrations are bright and engaging, and the questions are exactly the kind my kids actually ask, like why the sky is blue and how planets form. The explanations are simple enough for young readers but never feel dumbed down. The pages are sturdy and the layout makes it easy to flip around and pick a topic. It's sparked so many great conversations, and it makes a perfect gift.

MichaelPaperbackVerified PurchaseOctober 7, 2026

Fun and informative!

Got this for my kids ages 5-8 and they love it. The illustrations are colorful and keep them engaged, and the facts are genuinely interesting, even I learned a few things. Great way to answer all those endless "why" questions in a fun, easy to understand way. Highly recommend!

Lana B.HardcoverVerified PurchaseOctober 10, 2026

Very creative and fun book for kids

I bought this book for my daughter and my niece, and they absolutely love it. It is super entertaining, full of color, and answers their questions in a clear and fun way. They have a great time reading it, so I highly recommend it!

Odailin H.PaperbackVerified PurchaseSeptember 27, 2026

Fun and interesting

Interesting book for kids. I have a very curious 4 year old and i have been reading it to her one page at a time and have a fun and interesting conversation everytime. We love it.

Crystal J.PaperbackVerified PurchaseOctober 9, 2026

Amazing

My little ones love it. 🧸✨😊 Learning through interesting things with pictures is finally the easy way to explain the whys kids keep asking. 📚🎨💡

GrinchPaperbackVerified PurchaseOctober 4, 2026

Fun and interesting!

This is such a cool book, I’m going to save it for a Christmas present but my kids will absolutely love it!

Gino G.PaperbackVerified PurchaseSeptember 29, 2026

Questions

Good questions, answered

Still curious? The full product details are on the book's Amazon page.

Who is this book for?

Curious kids ages 5 to 10. A 5-year-old can read or listen to the bold answer line on each page, while older kids read on for the full explanation and the WOW! fact. It also works as a read-aloud for younger children.

Is every page in colour?

Yes. All 130 pages are printed in full colour, and each of the 104 questions has its own illustrated page.

Paperback, hardcover or Kindle: which should I choose?

The paperback ($19.90) is a big 8.5 × 11 in book. The hardcover ($36.90) has a sturdy laminated hard cover, a lovely choice for a gift. The Kindle edition (from $6.90) arrives instantly; its full-colour pages look best on a colour screen such as a tablet or the Kindle app.

How is each page organised?

Every page follows the same path: a True or False? statement to test, the answer in one bold line, a short explanation of the why, and a WOW! fact. At the end of each world, a Brain Zone busts three myths and asks four quiz questions, with the answers at the bottom of the page.

Is there a Book 2?

100,000 Whys for Kids is Book 1 of the Curious Kids Collection, and its last page gives a first peek at Book 2. Grown-ups can grab the free Myth-Buster Cards and be among the first to hear when it's out.

Cover of 100,000 Whys for Kids

Give every “why?” a real answer.

104 big questions · 130 full-colour pages · ages 5–10 · myth-busters & quizzes inside

Paperback · $19.90 Hardcover · $36.90 Kindle · from $6.90

All buttons open the book's page on Amazon.com.

Paperback$19.90
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