Computers

The ladder

1. Ages 3–5
   • Match the LampsSwitch lamps to match the picture and count themOpen →
2. Ages 6–8
   • Five LightsTurn on lights worth 1 to 16 to make a numberOpen →
3. Ages 9–14
   • Coin JarGuess what a loop prints, then run it day by dayOpen →
4. Ages 15–18
   • Twenty QuestionsFind one name in a phone book by halving, then compareOpen →

Two rules every rung keeps

The Fade Rule. Every game ends on a plain screen: the same numbers with the computers words gone, so the maths leaves with you.

The Own-Lane Rule. Your numbers are compared only with your own past, never with anyone else's, and they stay on this device.

Problems built on something you love help most when the context carries the maths, not when it decorates it. These ladders are a design, not a promise.

Ask a grown-up tonight: “What would you make if you could program anything?”