The piezofilm speaker kit is both educational and fun. The piezoelectric material is a thin flexible plastic sheet with metalized surfaces. When voltage is applied the piezofilm changes size. The kit incorporates a LM386 integrated circuit that amplifies an electrical sudio signal from an IPOD or similar device, and outputs the amplified signal to the piezoelectric film which generates audible sound.

Piezo Speaker Video (High Resolution)
Piezo Speaker Video (Low Resolution)