The rink measures nine feet by five feet, and attaches to any garden hose. There are 30 nozzles, each of which spray a two-foot plume of water over both players. It comes with two plastic hockey sticks, an oversized plastic puck and two 12" high by 32" wide by 8" deep inflatable goals. The rink itself is made of sturdy PVC. You can get one today for the really reasonable price of $49.95 US.
What more do you need to know? Hockey under a sprinkler when it's warm out. As I said: sheer brilliance.
Source: Craziest Gadgets