American football

The same love, at every age. This door has games for 3 of the four age groups so far.

The ladder

Ages 3–5 Not made yet.
The nearest rung is one up, Ages 6–8: Ten Yards in Four Tries →
Ages 6–8
- Ten Yards in Four TriesCount on to ten yards each try
Ages 9–14
- Two Lines Joined at 50Put both halves of the field on one number line
Ages 15–18
- Kick or Go for TwoCompare expected points for a kick and a two-point try

Two rules every rung keeps

The Fade Rule. Every game ends on a plain screen: the same numbers with the american football 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 play today do you think gained the most ground?”

Grown-ups: Spark & Whetstone has an American football door too.

Other doors · Your door and your ages