Physics teacher John Koser turns his students into radio receivers. He has developed a hands-on kit that teaches the principles of sound induction/conduction in a way that students can really sink their teeth into! When students bite on the dowel, the frequencies of the attached audio signal (from a radio) become vibrations. The sound is then transmitted from their teeth to their ears. Students easily assemble "Tooth Toons" in just one class period. They come five to a kit, with instructions and activities. Grades 7-10. Read what Scientopica had to say about "Tooth Toons".