Age: +4 years. Number of players: 2-4. In this easy childrens game, players choose 1 of 4 hippos, throw the marbles into the central pond, and try to swallow the most marbles with their hippo to win. The marbles are not loose. Keep them in the handy marble container. To store the game or carry it around, just pull up the levers on each hippo and the game fits neatly into its box.