Bootoos are like small stamping tubes – end-stopped tubes sounded by thumping them, closed-end down, against a solid surface to excite a clear-pitched tone from the air within. But unlike stamping tubes, bootoos have one or two tone holes along the side so that each tube can produce two or three notes. That adds up to four or six notes for a player with one tube in each hand. If ridges are filed into the surface of the tube you can also do a kind of pitched scraping. Bootoos like to make gently rhythmic dancing raindrop music. Credit to the late Darrel DeVore for the developing these ideas and giving the world some lovely bootoo music.