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Lumo's World

The Whys

Big questions, answered by Hazel

Children ask why all day long, and that’s a wonderful thing. In every Lumo’s World book, Lumo asks a big question and Hazel the inventor explains it in a way a child can remember.

Each book comes with a Why page for grown-ups and children to enjoy together: a short explanation, an experiment to try at home, and things to talk about.

🔒 The Whys are unlocked with the book you own

Lumo, a small orange fox with a blue scarf, smiling.Hazel, a hedgehog in round glasses with a purple scarf and an inventor's bag.

How to unlock a Why

  1. 1

    Find the Discovery page

    It's the very last page of your book, the one with the QR code.

  2. 2

    Scan the QR code

    Point your phone's camera at the code. It opens that book's Whys page and the Why opens up by itself!

  3. 3

    Or type in the book's code

    If it doesn't open, type in the code printed right beside the QR code. Each book has its own code.

I have Book 1: open its Why

(No account, no sign-up, no ads. Just your book.)

A peek at what’s inside

Hazel

“Every book unlocks its own Why, and more are coming. Maybe one day, a whole library of them!”
  • Book 1Locked

    Why is ice slippery?

    Unlocked with the QR code in Book 1.

  • Coming soonLocked

    How do snowflakes form?

    Coming soon. Not available yet.

  • Coming soonLocked

    Why does ice melt?

    Coming soon. Not available yet.

  • Coming soonLocked

    What makes lightning?

    Coming soon. Not available yet.

  • Coming soonLocked

    Why is the sky blue?

    Coming soon. Not available yet.

  • Coming soonLocked

    Why do we get hiccups?

    Coming soon. Not available yet.

No book yet? Book 1 is coming Christmas 2026. See the book.