Gallery 1 

Longfellow School

Oak Park, Illinois


by Carl P.


Flexible plastic tube, board with holes, nuts, washers and screws.


Place three pegs (nuts, screws, washers) into certain holes in the board until your tube fits. (See arrows at left.) Then wrap wire around the tube and the board at the other end. Pour water into the free end of the tube.

How to make the sound:

Beat on the end of it with your hand. It vibrates the air column inside the tube.

You can change the pitch by raising and lowering the tube to change the size of the air column. You can beat harder or softer on the tube to change the volume.