Piano

The ladder

1. Ages 3–5
   • Twos and ThreesSpot black keys in twos and threes, then find COpen →
2. Ages 6–8
   • Finger NumbersNumber your fingers and match the two handsOpen →
3. Ages 9–14
   • Why 88 Keys?Split eighty-eight keys into octaves and patternsOpen →
4. Ages 15–18
   • Why Twelve Fifths Do Not FitFind which steps visit all twelve keysOpen →

Two rules every rung keeps

The Fade Rule. Every game ends on a plain screen: the same numbers with the piano 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: “Which piece today would you like to hear again?”