Hiking

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: How Much Farther? →
Ages 6–8
- How Much Farther?Read a trail sign and work out how much farther
Ages 9–14
- How Long Is the Walk?Compare a short steep route with a longer one
Ages 15–18
- Tobler’s Hill RuleFind the fastest slope on a fitted walking curve

Two rules every rung keeps

The Fade Rule. Every game ends on a plain screen: the same numbers with the hiking 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: “Where on the trail did it feel steepest, and would the map have told us?”

Grown-ups: Spark & Whetstone has a Hiking door too.

Other doors · Your door and your ages