There are hundreds of great bath toys available, many of which do an excellent job keeping kids occupied in the tub. But just barely. This new kit, however, comes with three tracks and one paddlewheel that suction-cups to the bathroom wall and into which kids can drop the included ball or water (scooped with the included ladle). The set combines the best of gravity and waterpower, making your kid into a mini Vitruvius — and a clean one at that.