Plump is a pretty fun “maze” app for the iPhone or iPad. Normally, $0.99, it is available for free download for a limited time.
The goal of the game is to navigate through the maze and gobble up the chocolates and treats. M (age 3) just loves this game. He can play through about level 25 on his own before the “hazards” become a bit tricky for him to navigate. It uses a tap interfaces to rotate the direction you are traveling. Fairly easy to learn, but it is challenging to master the later levels.
Good for children 3 and up. (not recommended if you are avoiding games that feature candy)