The app is basically a little animation of a top-down view of a racing car, ice-cream van or a boat. You make a vehicle in paper, LEGO, etc. and then put the iPhone it it to add the driver character, animation and sounds. Colours, etc. can be customized and when you move the vehicle around, the motion sensors in the iPhone trigger sounds, such as the racing car engine roaring. See the video for more.
Next post: If… Behavioural Heuristics and Design