Turn your physics demonstrations into works of art. Simply place the funnel in its harness; suspend the unit; fill it with sand, give it some potential energy; and let it fly. The resulting Lissajous patterns created by the independent frequencies of the swinging pendulum are truly a work of art. Sand can be purchased separately. Developed by Bruce Yeany. Includes instructions.
WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.