For those of you out there that own a swimming pool or hot tub and love to throw swimming parties, it may be worth checking out the Kool-Light-O-Scope. It is the equivalent of having a disco ball on a dance floor. The Kool-Light-O-Scope uses spinning LEDs to create changing patterns of light and color at the bottom and the sides of the pool or hot tub. Trippy, eh? $35 smackaroos to get your hands on this device.