
COOPERATIVE BUILD
Cardboard City
Build places, join them with roads, then invent a shared mission.
60–90 min · almost freeOpen mission →
THINGS TO DO
Useful missions for real homes, real weekends, and kids who may change the plan halfway through.

Start with a category. Time, cost, weather, and age guidance appear on each mission where they are known.

Build places, join them with roads, then invent a shared mission.

Use scrap materials, make a bridge, and see what it can hold.