Solve bite-sized coding challenges, run your program against real test cases, and earn points for getting it right — and fast. Built for curious kids.
Write Python in a real editor. It runs instantly with Pyodide — nothing to install.
Every solution is checked against multiple hidden test cases the moment you submit.
Correct solutions earn points — and faster algorithms earn a bonus on top.
Sharpen your problem-solving with bite-sized coding challenges. Write a Python program, run it against real tests, and earn points for speed and correctness.
Learn to program in Python from the ground up: data types, variables, expressions, and loops. Write short programs, run them against real tests, and earn points for getting them right.