From Wikipedia: Brain Assist or Touch de Uno DS is a puzzle video game released for the Nintendo DS in Japan, North America, and the PAL regions. Studies in the 1960s demonstrated the lateralization of brain function. The left-brain hemisphere deals with sequential analysis - reasoning using language, mathematics, abstraction and reasoning. Memory is primarily stored in a language format. The right-brain hemisphere deals with auditory, visual, and spatial concepts (art, for example) dancing and gymnastics, which is what the game aims to stimulate in the player.