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"Best money I've spent on my kids' education outside of school. The conversations it starts are priceless."

Jennifer L. Jennifer L. Mom of three ·★★★★★

"My son is a screen kid. He read this until 9pm without me saying a word. I bought two more for his cousins."

David K. David K. Father of two ·★★★★★

"My daughter explained tectonic plates to my mother-in-law. She's 8. We were completely speechless."

Rachel M. Rachel M. Mom of two ·★★★★★
All-new Volume 2

Kid’s Encyclopedia “10,000 Whys” Vol. 2

4.9 2,847 reviews
$39.90 $79.8050% OFF
  • All-new questions and answers for ages 6–12
  • Real “wait, what?!” facts — like the man who hiccuped for 68 years straight
  • A “Curiosity Level” page: color in a star for every wow moment
  • The follow-up to 10,000 Whys, in the same gift-ready hardcover

⚡ Flash sale — prices increase in 4 hours

🛡️ 30-day money-back guarantee 🔒 Secure checkout 📦 Free shipping

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Not sure which one to get? Here’s the simple difference.

Both are big, sturdy hardcovers that kids pick up on their own. Here’s what makes each one different.

Side by side
Vol. 1 Vol. 1THE ORIGINAL
Vol. 2 Vol. 2NEW
What’s inside?
Answers to the everyday “why?” questions kids ask
Brand-new, surprising facts that make kids say “Wait, what?!”
Who is it best for?
A child who asks “why?” about everything
A child who loves surprising facts — perfect if they already have Vol. 1
Does it have the star “Curiosity Level” page?
No
Yes — kids color in a star for every wow fact
How big is it?
Small hardcover (B5 size)
Big hardcover (A4 size)
Have families tried it?
18,000+ families, rated 4.9 ★
Brand new
When will it arrive?
Ships today
Ships today
Price
$39.90
$39.90
OUR TIP

Can’t decide? Get both.

They’re two different books, so nothing repeats. Two surprises instead of one.

What’s insideVol. 2

  • Science experiments
  • Animals & wildlife
  • Space & planets
  • Weather & nature
  • Explorers & adventure
  • Records & oddities

Get the 10,000 Whys set

Start with the original, keep the curiosity going with Vol. 2. Two hardcovers that look beautiful side by side on their shelf.

The results speak for themselves

Loved by 18,000+ Families Worldwide

Real parents. Real kids. Real results — tracked over 90 days.

94%

of parents say their child's school performance improved within 60 days

📈 School performance

97%

of kids voluntarily picked up the book without being asked, after day 7

📚 Voluntary reading

91%

of parents said their child started asking deeper, more insightful questions

🧠 Curiosity & thinking

Results from a 90-day post-purchase survey of 1,200+ customers, December 2024 – February 2025.

What parents say about Vol. 2

★★★★★

"My 9-year-old asked me 'Mom, why do we have two eyes instead of one?' I didn't know the answer. He went straight to this book, found it, and spent 45 minutes reading about vision, brains and evolution. He came back and explained it to me. I almost cried. His teacher called two weeks later to say he was the most engaged student in class."

Rachel M. Rachel M. Mom of two · Texas · ✔ Verified buyer

★★★★★

"I was skeptical. My son doesn't read. He's a screen kid. I put this on the coffee table and didn't say a word. Day 3, I found him on the floor reading about black holes at 9pm when I thought he was asleep. He's read it cover to cover twice. That is not a normal thing for him. Buy it — it competes with screens and wins."

David K. David K. Father of one · California · ✔ Verified buyer

★★★★★

"Bought 3 copies — one for each of my kids and one for my nephew's birthday. The dinner table conversations we've had because of this book are priceless. My 7-year-old explained tectonic plates to my mother-in-law. She was completely speechless. This book changes how kids think, not just what they know."

Jennifer L. Jennifer L. Mom of three · Florida · ✔ Verified buyer

★★★★★

"My daughter has never once picked up a book without being forced. I left this on the coffee table on a Friday. By Sunday she had read half of it and was explaining to her grandfather why the moon doesn't fall out of the sky. He's a retired engineer. He was impressed. I was speechless. This book is something else entirely."

Lisa W. Lisa W. Mom of two · Ohio · ✔ Verified buyer

★★★★★

"Bought this for my grandson's birthday not knowing what to expect. He opened it, looked at the cover for about thirty seconds, and said 'is this actually mine?' He read it at his own party. His mum called me two months later to say he'd read it three times and was asking if there was a second one. Best gift I've given in years."

Margaret T. Margaret T. Grandmother of four · Illinois · ✔ Verified buyer

Questions, answered

Is Vol. 2 different from Vol. 1?

Yes. Vol. 2 is a brand-new book of questions, answers and surprising facts.

Do they need Vol. 1 first?

No. Each book stands on its own, so kids can start with either one.

What ages is it for?

Ages 6–12.

What if they don’t love it?

Every order is covered by our 30-day money-back guarantee.