For grown-ups
RungPals is a placement game: each number has to go on a rung right away, before you know what comes next. Each choice is a small number-line estimate plus a guess about what is still in the bag.
Why it teaches: linear number games have unusually good early-maths evidence behind them (Siegler & Ramani). We claim the mechanism, not a measured gain.
Everyone gets the same draw, so differences come from choices, not luck. The bag is see-through: every number still in it is shown. No timer, no score to beat, no streak. Today's ten is the same for everyone and never expires.
What it never does
- No accounts, no ads, no tracking — anything kept stays on this device.
- No streaks, timers to beat, points to chase or leaderboards.
- No chat, and nothing anyone types is sent anywhere.