For grown-ups
This is proportional reasoning and unit rates as the game itself. The rules use exact fractions. Each level card says what the level asks for: how many stages, and how many of them need a round-up (machines = items arriving ÷ what one machine takes, when that isn’t whole). Rates are shown per minute; with the best machine counts every number on a level is whole (with other counts you may see a mixed number like 3¾). No timer, no score; progress stays on this device.
What it never does
- No accounts, no ads, no tracking — progress stays on this device.
- No streaks, timers-to-beat, points to chase or leaderboards.
- No chat, and nothing your child makes is sent anywhere unless you choose to.