Abstract: A heat sink structure of a module substrate includes a plurality of stripe-like bottom regions extending in a longitudinal direction and repeated in a lateral direction with a predetermined pitch, a plurality of stripe-like top regions extending in said longitudinal direction and repeated in the lateral direction with said predetermined pitch, such that the stripe-like bottom regions and the stripe-like top regions are repeated alternately in the lateral direction, wherein the stripe-like top regions and the stripe-like bottom regions have respective lateral edges that are connected with each other by cooling fins.

Abstract: A water toy is provided with play members in a game body which is at least partially filled with air. The water toy has a fountain generating mechanism for generating a stream of liquid in the air of the game body to propel the play members through the air. The play members may be caught by receiving elements.