Singing

The ladder

1. Ages 3–5 Not made yet.

   The nearest rung is one up, Ages 6–8: Eight Notes, Seven Steps →

2. Ages 6–8
   • Eight Notes, Seven StepsSing do to do and count notes and stepsOpen →
3. Ages 9–14
   • An Octave DoublesDouble a pitch for an octave and find the middleOpen →
4. Ages 15–18 Not made yet.

   The nearest rung is one down, Ages 9–14: An Octave Doubles →

Two rules every rung keeps

The Fade Rule. Every game ends on a plain screen: the same numbers with the singing 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 line of the song stayed in your head, and why?”