Disney Infinity.... For the PS3, Wii U, Xbox 360.... it's a lot like skylanders where you have a power base and you place figures on the base and the figures let you play those characters in the game. These discs work with the figures, the round ones power up your figure, the square-ish ones change the world, or add vehicles or usable items.
So in short, these go on top of a accessory that plugs into a game system.
By the way I like you avatar photo, I use to own a Bally Freedom Pinball.
~Jeff