Laboratory activity in which beads are attached to a string and dropped to achieve a given rhythm.  Large paper clips make adequate beads and a coffee can makes a good sounding board. <b>Please improve this sketch: </b><i>If you don't want to become a commons editor, sign it to public domain and give it to someone who can post it for you</i>
The person who signed and released the drawing under CCSA 4.0
CC BY-SA 4.0
Drawn by student in my classroom.