Children's Encyclopedia "100k WHYS" - Build Your Child's Ultimate Brain
30-Day Money Back Guarantee
That's how confident we are in your results. But if you're not thrilled, send it back and we'll refund your purchase.
My child now talks about science daily. This book is fun, thoughtful, and genuinely helpful. One of the best gifts I've bought this year.
We've received reports of unauthorized websites selling imitation products. Genuine Olivetta products are sold only through TryOlivetta.com.
"The book that teaches your child what school never will."
Help your child develop scientific thinking, satisfy endless curiosity, and build critical problem-solving skills through 100,000 engaging questions and answers that make learning feel like an exciting discovery.
The Hidden Reason Traditional Books Fall Short
Memorization Over Mastery Standard encyclopedias just hand out facts. They tell kids what happens without explaining the how or why. Without deep understanding, that surface-level knowledge vanishes the second they close the cover.
Fragmented Learning Most books silo information. They separate space, biology, and history. But a child’s brain thrives on connecting the dots across different subjects to see how the whole world actually fits together.
Dry and Academic So many reference books read like college textbooks disguised with cartoon covers. The delivery is so dense and dull that kids abandon them after two pages. The format actively kills their natural curiosity.
Unable to Compete with Tech If a book isn't visually stimulating and highly engaging, it will always lose the nightly battle against tablets and videos. Reading starts feeling like a chore rather than an interactive adventure.
One Book. Every Subject They're Curious About.
Space & Universe
Black holes, planets, stars, rockets and life beyond Earth
Dinosaurs
Why they went extinct, how we find them, what they really looked like
The Human Body
Why your heart beats, how your brain works, why you dream
Oceans & Sea Life
Deep sea creatures, why the ocean is salty, how waves form
Weather & Nature
Thunder, lightning, tornadoes, rainbows and the sky
History & Civilisations
Ancient Egypt, the Romans, great inventions and how the world changed
Animals & Wildlife
How animals survive, migrate, communicate and why some go extinct
Science & Physics
Gravity, light, sound, electricity and how everything works
Plants & Biology
How plants grow, why leaves change colour and how living things work
The Brain & Mind
Memory, emotions, the senses and why we think the way we do
Technology & Inventions
How machines, computers and everyday gadgets really work
Earth & Geography
Volcanoes, earthquakes, countries and the world around us
Questions About 100K Reasons Why?
Everything you need to know about this children's encyclopedia.
A real, printed book delivered to your door. No downloads, no apps, no logins.
This is the official, full-color edition. The cheaper copies floating around online are knockoff prints, usually black-and-white with no illustrations, and they aren't covered by our guarantee. If it isn't from tryolivetta.com, it isn't ours.
It's one of the most-gifted things we sell, especially by grandparents. Birthdays, Christmas, and the classic "get this instead of a tablet" gift.
It's designed as a screen-free way for kids to explore the world. Most families use it as that exactly.
Space, dinosaurs, the human body, oceans, weather, history, animals, science, plants, the brain, inventions and technology, and the everyday "why" questions kids actually ask.
That's exactly who it's made for. It reads like a comic, not a textbook, with one short question and answer at a time, so kids pick it up without being told to. Leave it on the table and let them find it. If they won't touch it, you're covered by the 30-day guarantee.
The illustrations are drawn for the 5 to 12 range. Plenty of 13 and 14-year-olds still enjoy it, especially the kids who like knowing how things work, but if your teen is sensitive about "kid" books, this one may feel young to them.
It's made for kids ages 5 to 12. Younger children love going through the pictures with a parent or grandparent, and older kids dive straight into the details on their own.
Money Back Guarantee!
Gift it completely risk-free for 30 days — if you're not 100% satisfied with your kid's results, we'll refund every penny, no questions asked. We stand behind our development formula because we know it works.