Each stage is a wider word: from 1 bit, a single switch, to the 64 bits of a modern processor.

Find your level

Choose the stage that sounds like you, or let a short placement quiz suggest one.

Take the placement quiz

About 10 questions that get harder as you go. Stop whenever it feels too hard: that's where you'll start.

💡1/5

Ages 7–10 · first steps

On and off, pictures made of switches, and giving a robot exact instructions.

🧩2/5

Ages 10–13

Counting in binary, letters as numbers, logic gates and a circuit that adds.

⌨️3/5

Ages 13–16

How a transistor works, gates made of transistors, memory, and your first real programs.

🧠4/5

Ages 16–18

Inside the processor, machine code, compilers, searching, sorting and big O.

🏛️5/5

Ages 18+ · advanced

Turing machines, the limits of chips, the call stack and floating-point numbers.