Hungry Hungry Hippos
More modestly known as Hungry Hippos in the UK, Hungry Hungry Hippos is a tabletop game produced by Hasbro, the goal of which is to consume as many marbles as possible with one of four competing toy hippos.
Invented by toymaker Fred Kroll in 1967, the initial production of the game wouldn't be sold until 1978; it's now become one of the most recognisable children's games alongside other 'Elefun and Friends' products like Elefun and Mouse Trap.
Originally, the four hippos were known as Lizzie Hippo (purple), Henry Hippo (orange), Homer Hippo (green), and Harry Hippo (yellow), though as of the 2009 re-release of the game the creatures have been renamed to Sweetie Potamus (pink), Bottomless Potamus (yellow), Veggie Potamus (green), and Picky Potamus (orange).
In 2012, Emmett/Furla Films - the studio behind Martin Scorsese's Silence - confirmed that an animated feature film based on the game was in the works, with production scheduled to begin in 2016.
A yearly Hungry Hungry Hippos World Championship is currently held at the Indiana Convention Center, Indianapolis.