A cooperative children's game in which distinguishing the weight of objects is a central element. Aim of the game: 6 wooden hippos (two light ones, two medium-weight ones, two heavy ones) have to be moved to the finishing spaces that correspond to their weights. If the players are successful, they all win together. How it is played: Players take turn rolling the die and completing the corresponding actions (moving a hippo 1, 2 or 3 spaces on the board, switching two hippos, moving 2 hippos one space each). During each turn, they lift the hippo and comment on whether they think it is light, medium or heavy. (The weight category is specified on the underside of the hippos' feet, but no peeking is allowed during the game.)