A Puzzle Mobile. This is another supposed "Sonic Underground" item that actually has nothing at all to do with the show. It is a puzzle (made of foam) that you put together and then hang on something and it turns or something. The illustrations don't really clarify. Notice that the Sonic Underground logo appears as a necklace on the stock-art just like the Dennys' Give-away plushes have it. What an odd concept. Known puzzles include Sonic, Sonia, Knuckles, Manic and Robotnik.