Sure, it's jazzy, but we love this temperature-controlled faucet light because it brings a level of safety to a kid's bathroom. In a few seconds, this thimble-sized device screws onto any household faucet. And then the fun begins: When the water is cold, the stream lights up with a blue hue. As the water becomes temperate, the stream is bathed in green, and when the water gets hot (and here's the safety feature), it glows red. If there are no kids in your home, the faucet light adds a bit of elegance to any powder room. These cute gadgets are relatively cheap. We found a pack of three for about $15.