Explore the creation of polyrhythms with this musical exhibit. Hole Saw Rhythms lets you create the simple, regular beats that you hear in familiar songs, as well as more complex, irregular beats that challenge your sense of rhythm. Dulled hole saws of varied sizes can be positioned along the circumference of the circle made by a rotating arm. The strategic placement of these resonant hole saws creates musical rhythms that can be altered innumerous ways.