Fragile Eggs is a game to study the development and ‘trainability’ of the foundational visual-spatial cognitive skill of mental rotation. The objective of the game is to improve mental rotation in players. Andie Hshieh made amazing graphics for the game, and Li Chen Han programmed a smooth and beautiful game mechanic for the iPad. Faraz Farzin, the Chief Scientist at the Social Apps Lab, ensured that the game is relevant in terms of cognitive development. In January 2012, Fragile Eggs was play teste with volunteers at the Berkeley School to establish the typical base-line performance of mental rotation in our game.