New figurines not only give you new characters, but full worlds.
Disney Infinity will feature multiple game worlds that are character specific. This information was revealed at today's Disney Infinity event.
Disney Infinity will come with three figurines to start: Sulley from Monsters Inc., Mr. Incredible from The Incredibles, and Capt. Jack Sparrow from Pirates of the Caribbean. These characters are brought to life in game through a reader which features three different slots. Two of these slots are for playable characters, one of which is for power discs. Power discs act as power-ups for the many characters.
When the characters are in game they can either go to a specific world meant only for them, or a Toy Box mode, where any of the characters can meet up.
The Toy Box mode features both goals as well as free-play options. You can solve puzzles using the toys you have accumulated as well as build structures using hundreds of different pieces.