This is a free game for the iPhone and iPad. It is very similar to Little Big Planet, not to mention that it is FREE! :D
http://www.youtube.com/watch?v=uHqdbqqvnjY
Note: Only the first episode is free. The other episodes cost very small amounts of money, or you can just download a bunch of free apps from the game's app list to obtain the crystals necessary to get the other episodes. It's best to play through the first episode to see if you like the game first before you buy the other episodes.
Downloading the Android version as we speak. Looks pretty cool!