Abstract: A toy has an enclosure pierced by a plurality of holes, each hole being in the shape of a distinctive geometry. A plurality of blocks are shaped to pass through only individually associated ones of the holes. Inside the housing, a balanced panel receives the blocks as they pass through the holes. When the cumulative weight of all blocks on the panel equals or exceeds a spring bias, the balance panel tips and performs a surprise function. In the disclosed embodiment, the surprise is a toy cow popping through a door and the blocks discharged out the back is both a surprise and a reward.