The Players balance cargo on a bamboo ship. If you tip over the ship, you're out.
From the box quoted exactly:
Let's go sailing on this sunny day! Load up the picnic baskets and all which is needed for a lovely day on the water. But keep an eye on the loading, because the sea water keeps the boat unstable. Balancing fun on wild waters!
Contents: 1 sailing boat with flag, 36 bamboo cargo items in 3 different shapes 1 dice (sic). For 2-6 players. From 4 years of age. 100% natural bamboo.