Pod apparatus for education and amusement

A demonstration pod and method for demonstrating dental situation and procedures. By way of example, a Sonipod demonstrates the effectiveness of an electric toothbrush and provides for educating a dental patient on proper brushing techniques to promote healthy oral hygiene. The instructional display includes a simulated tooth and gum assembly within a partially liquid filled chamber. High frequency brush movements create cavitations in the liquid of the chamber. The display also preferably includes a plurality of oscillating light emitters and an oscillating circuit that pulses at a range of frequencies to match and compare the frequency of brush head movements for different models of electric toothbrushes. Additional demonstration pod units are also described for non-dental purposes, in particular for comforting a baby, providing a light for a child, and entertaining a child.