These are coin banks / money banks, but they have a special feature! See those holes? They make noise! Specifically, they'll make the 'ring collect' sound for every coin you drop in through the slot in the top. Each bank is a fully 3D bust of either Sonic, Tails or Knuckles. The card (last photo) illustrates how to use it, and that it makes sounds. Each base is labeled with the character's name. Knuckles looks sort of wierd though...look at his mouth & sort of odd eyes.