your idea becomes your curriculum.
describe your game
// your idea → your curriculum
Tell us what you want to build. A hamster escape game, a dinosaur platformer, table tennis with superpowers — anything. Your idea is the starting point.
learn it step by step
// real js · not blocks
Sandbox breaks your game into lessons. Each one teaches a real skill through your specific game. You write the code — with just enough help.
ship something real
// yours · forever
Finish your game, get a live link, share it. And know that you actually built it — every line, every variable, every collision check.
every game teaches real skills.
You can see exactly what you've learned — and what unlocks next. Skills build on each other, just like in real programming.
- Variables, loops, functions — the real building blocks
- Collision detection, game state, scoring systems
- Each skill has multiple mastery levels
- Your profile tracks exactly what you know
other tools build games for your kid. we teach your kid to build games.
Real JavaScript. Real skills. Every line of code written by them — with just enough guidance to make it possible.
ready to start?
Pick any game you want to build. We'll take it from there.
▶ START BUILDINGFREE · NO CREDIT CARD · RUNS IN YOUR BROWSER