pockett.
Free, interactive Python. You pick a project (a car, a rocket, a drum machine) and your code makes it come alive: every lesson you pass bolts a new part onto a live demo. Python runs entirely in the browser (Pyodide / WebAssembly); there is no code-execution server, and no account is needed (an optional free account syncs progress).
pnpm install
pnpm dev # http://localhost:3000
pnpm typecheck # tsc
pnpm validate # runs every lesson's solution + starter through the real Python engine
pnpm build
What's in the box
| Project | Python concepts | Comes alive |
|---|
| 🏎️ Turbo Garage | print, variables, math, functions, if/else, loops, lists, dicts, classes | a car you can drive, then an autopilot you write |
| 🚀 Launch Control | loops, math, functions, conditionals, dicts, classes | a rocket flight to orbit |
| 🥁 Beat Lab | strings, lists, loops, functions, dicts, classes | a synthesized drum machine |
Plus a dashboard (XP, streak, badges) and a free-play Python sandbox.
How a "living project" works
- The learner edits one growing
main.py per project. Each lesson appends a TODO to what they already wrote.
- Run executes it in Pyodide, then grades it with the lesson's
assert tests.
- The result is a
ProgramHandle: the scene reads plain values (program.num("top_speed", 120)) and calls the learner's functions (program.call("steer", left, right)) every frame.
- Passing a lesson unlocks features (
lesson.unlocks). Scenes render locked features as blueprints and unlocked ones fully alive.
See docs/ARCHITECTURE.md for the full picture, and docs/ADDING_A_PROJECT.md to build a new one.
Accounts
Learning needs no account: progress saves in the browser. A free account (Supabase Auth) syncs progress,
code and streaks across devices; see supabase/migrations/ and docs/ARCHITECTURE.md.
