Kids to Engineers.
Tumbly is four engineering games for kids 3 to 12.
Free to start. No card needed.
or get the app
or get the app
What is Tumbly?
Tumbly is four engineering games for kids 3 to 12, made by Winding Labs in Mill Valley, California. Drive tells true stories about the places you pass. Blocks designs builds from the bricks on your table. Inventors reads true picture books aloud. Phone sends kids outside to spot bugs, birds and plants. It’s free to start.
🧱 Tumbly Blocks
Your bricks. Their dream build.
Say what to build. It uses only the bricks on your table.
📚 Tumbly Inventors
True books about real builders.
Inventors and engineers, read aloud as the words light up.
📻 Tumbly Phone
Go outside. Find things.
Point at a bug, bird or plant and collect it.
🎂 Birthdays and holidays
A brick model of the birthday kid.
Add a photo. Build it together at the party.
Or build one of these, free, with every step pictured:
🚘 Got a Tesla?
Stories on the big screen.
Tumbly plays on your Tesla’s screen and follows the car, so each story starts as its place comes into view.
The four games at a glance
| Game | Where | What kids do |
|---|---|---|
| Tumbly Drive | On the road | Hear true stories about the places the car passes, then answer a quiz question. |
| Tumbly Blocks | At the table | Say what to build and follow 3D steps made from the bricks they already have. |
| Tumbly Inventors | In a book | Follow true picture books about inventors and engineers, read aloud at three reading levels. |
| Tumbly Phone | Outside | Spot bugs, birds and plants with the camera, collect them and finish quests. |
Pricing
Free
- Every ready-made story, build and book
- 20 new builds a day, 1 new book a month
- 3 questions and 10 finds a day
Tumbly Family
or $59.99 a year. 7-day free trial.
- Everything in Free
- 10 new books a month: any hero your kid picks, read aloud
- 50 questions a day about what you drive past
- 100 finds a day outside
Questions
What ages is Tumbly for?
3 to 12. Each kid's age sets the story length, the words and the size of the build.
Do I need to download anything?
No. Tumbly runs in the browser on phones, tablets and computers. It's also a free app on the App Store and Google Play.
Is Tumbly safe for kids?
Yes, it’s made for them. Settings, purchases and links out of the app need a grown-up, kids can only message their own family, and there are no ads. See how we keep kids safe.
Does Tumbly use AI?
Yes, to make new builds, books and stories and to answer spoken questions. AI features run only after a grown-up agrees to the parent notice, and each can be switched off in Grown-ups → Controls. Stories are fact-checked. See the parents' guide.
Can I cancel any time?
Yes. Tumbly Family is sold here on tumbly.ai, never through the App Store or Google Play, so you cancel it in Tumbly, in Grown-ups → Plan & billing. Your family keeps access until the end of the paid period.