Two hollow cylinders are weighted symmetrically. O ne baton has the weights placed at its ends, the other in the center. Grasp the batons in the center and try to rotate them back and forth.
Suggestion: Give the end weighted baton to a seemingly
strong student and the center weighted baton to a relatively weak looking
student. Have a contest as to who can move the baton the fastest.
This demo can be found in cabinet B on shelf 2 of the UCSD PUL Demo Room
(WLH 2015).