One sheet of paper. One question answered.
Printable fold-and-read books where Kai and Lily, two little detectives, answer the questions kids ask every day.
- Print one sheet, fold it, make one cut
- A pocket-sized 8-page book in minutes
- Kai and Lily, two little detectives, on every page
- Short, simple answers that are easy to read aloud
The questions kids actually ask
The body, plants, animals, science, space, technology and Earth. One question per book, answered in 8 small pages.
- Why do we get hungry?
- Why do we sneeze?
- Why does a cat purr?
- Why do stars twinkle?
- Why do magnets stick together?
- Why does popcorn pop?
- Why do cats have whiskers?
- Why do astronauts float in space?
- Why do we get brain freeze?
- Why is Mars red?
- Why does bread rise?
- Why do flamingos stand on one leg?
- Why does the Moon change shape?
- Why do ants walk in lines?
- Why does soda fizz?
- Why do eclipses happen?
- Why does our tummy growl?
- Why do coconuts float?
- Why can drones hover in the air?
- Why does bamboo grow so fast?
See all 100 questions
- 1Why do we get hungry?
- 2Why do we sneeze?
- 3Why do onions make us cry?
- 4Why does popcorn pop?
- 5Why do plants need sunlight?
- 6Why does a seed grow into a plant?
- 7Why do kangaroos have pouches?
- 8Why do turtles have shells?
- 9Why do magnets stick together?
- 10Why does the Moon change shape?
- 11Why do we get hiccups?
- 12Why do our fingers get wrinkly in water?
- 13Why do we have fingerprints?
- 14Why do we get bruises?
- 15Why do we feel dizzy when we spin?
- 16Why do we get brain freeze?
- 17Why does ice melt?
- 18Why does a mirror fog up when we breathe on it?
- 19Why do we wear sunscreen?
- 20Why does a balloon stick to the wall?
- 21Why do we have shadows?
- 22Why do we hear echoes?
- 23Why do coconuts float?
- 24Why does bamboo grow so fast?
- 25Why do roots grow down?
- 26Why do fruits have seeds?
- 27Why do trees have rings?
- 28Why do trees give us oxygen?
- 29Why do birds fly in a V shape?
- 30Why do owls come out at night?
- 31Why do cats have whiskers?
- 32Why do bats hang upside down?
- 33Why do ants walk in lines?
- 34Why do elephants have big ears?
- 35Why can’t penguins fly?
- 36Why do stars twinkle?
- 37Why do astronauts float in space?
- 38Why can airplanes fly?
- 39Why do boats float?
- 40Why do wind turbines make electricity?
- 41Why does a compass point north?
- 42Why do batteries make toys work?
- 43Why do speakers make sound?
- 44Why do eclipses happen?
- 45Why does the Moon have craters?
- 46Why can we see the Moon in the daytime?
- 47Why does Saturn have rings?
- 48Why is Mars red?
- 49Why does the ocean have tides?
- 50Why is it cold at the North and South Poles?
- 51Why do we yawn?
- 52Why do we have two eyes?
- 53Why do we burp?
- 54Why does our tummy growl?
- 55Why do we cough?
- 56Why do our ears pop on a plane?
- 57Why do we have eyebrows?
- 58Why do our nails keep growing?
- 59Why do we have belly buttons?
- 60Why do we brush our teeth?
- 61Why does a kettle whistle?
- 62Why does bread rise?
- 63Why does a fridge keep food cold?
- 64Why do we wear seat belts?
- 65Why do we put salt on icy roads?
- 66Why do we get static shocks?
- 67Why does soda fizz?
- 68Why do clothes dry on a clothesline?
- 69Why do lemons taste sour?
- 70Why do plants need water?
- 71Why does grass grow back after we cut it?
- 72Why are bananas curved?
- 73Why do carrots grow under the ground?
- 74Why do mushrooms pop up after it rains?
- 75Why do pine trees have cones?
- 76Why do some plants climb?
- 77Why does a cat purr?
- 78Why do dogs wag their tails?
- 79Why do birds sing in the morning?
- 80Why do flamingos stand on one leg?
- 81Why do whales spout water?
- 82Why do woodpeckers peck on trees?
- 83Why do snakes flick their tongues?
- 84Why do frogs croak?
- 85How does a submarine sink and rise?
- 86Why is space dark?
- 87How do rockets fly into space?
- 88How does a microwave heat food?
- 89How does a camera take a picture?
- 90How does a remote control talk to the TV?
- 91Why can drones hover in the air?
- 92Why can phones tell where we are?
- 93Why do comets have tails?
- 94Why do we have leap years?
- 95Why is Pluto not a planet?
- 96Why do geysers shoot water?
- 97Why do waterfalls form?
- 98Why are deserts so dry?
- 99Why do mountains have snow on top?
- 100Why do countries have different time zones?
From checkout to story time in 3 steps
Download
Instant access after checkout. PDFs in both US Letter and A4.
Print one sheet
Pick a book from the index and print it on plain paper at actual size (100%).
Fold, cut once, read
Follow the fold guide at the front of the PDF, then read it together.
Same easy path, every time
Printed, folded and read at home
3 bonus printables to keep the questions going
Included free with the Mega Pack. Each one matches the mini-books, page for page.
Activity Book
One activity page for every mini-book: word search or maze, fill-in-the-blanks, true or false, a safe at-home "Try it!" and a draw-and-label box. Answer key included.
Wonder Journal
Log big questions, review every mini-book with stars and favorite facts, track progress, and finish with a certificate.
Coloring Book
A picture to color for every mini-book, with the question printed on each page.
Pick the pack that fits your family
Both packs are instant downloads in US Letter and A4.
Explorer Pack
A great place to start.
- 50 printable mini-books
- US Letter and A4 PDFs
- Step-by-step fold guide
- Instant download
Mega Pack
All 100 books plus 3 bonus printables.
- All 100 printable mini-books
- Activity Book (119 pages)
- Wonder Journal (135 pages)
- Coloring Book (102 pages)
- US Letter and A4 PDFs
- Step-by-step fold guide
- Instant download
🔒 Secure checkout · Instant download · Personal and family use
Easy on you, fun for them
Good questions (we love those)
Is this a physical product?
No. It is a digital download that you print at home.
How do I get the files?
You get instant access after checkout: PDFs in both US Letter and A4.
Do I have to print all 100 books at once?
No. Print one book at a time, or a few at a time, whenever you like. Each book is a single sheet.
What paper and printer do I need?
Plain 70 to 80 gsm printer paper and any home printer. Print at 100% (no "fit to page").
How hard is the folding?
A few folds and one cut with scissors. The fold guide is at the front of the PDF. Ask a grown-up to help with the cut.
Can I print it more than once?
Yes, for your own family. Please don't share or resell the files.
What if my file won't open?
Email us, and we will fix it for you.
Safety note: folding needs one cut with scissors, so ask a grown-up to help. Books about magnets, batteries, heat, the kitchen and geysers suggest a grown-up for any hands-on part. The Moon and eclipse books remind kids never to look straight at the Sun.
Due to the immediate digital nature of our products, all sales are final, except where required by applicable consumer law.