Boomwhackers are brightly colored percussion tubes for the kids and kids-at-heart. You can whack almost anything and — boom, you are making music. The length of the tube defines the tune and is identified by the color. It is easy in groups to distribute the tubes by length and color for playing songs. If you put a cap (called an Octavator) on one end the tune lowers one octave. You can also play the tubesholding them vertically and tap on the floor; they become a stamping tube. They come packed in a net.