Hungry Hungry Hippos is a tabletop game made for 2-4 players, produced by Hasbro, under the brand of its subsidiary, Milton Bradley. The idea for the game was published in 1967 by toy inventor Fred Kroll and it was introduced in 1978. The purpose of the game is for each player to collect as many marbles as possible with his or her 'hippo' (a toy hippo model). The game is marketed under the "Elefun and Friends" banner, along with Elefun, Mouse Trap and Gator Golf.
The gameboard is surrounded by four mechanical, colorful, plastic hippopotami operated by levers on their back. When the lever is pressed, the hippo opens its mouth and extends its head forwards on a telescopic neck. When the lever is released, the head snaps shut and retracts. Colored plastic marbles are dispensed into the board by each player, and the players repeatedly press the lever on their hippo in order to have it "eat" the marbles, which travel down from under the hippo into a small scoring area for each player. The game continues until all marbles have been devoured, and it is then that a winner is decided depending on the player with the largest quantity of marbles.