Toss the two special made magnets into the air! As they collide and fall, they produce a screaming, clattering sound, much like a Cicada or high voltage sparking. It is amazing! Or, place them both on a low friction surface about 15 cm apart. As you turn one, the other will turn. If you spin one fast, you can observe coupling with the otherWhat produces the sound?? Great opportunity for students to test various theories!! Great opportunity for teachers to use the words "critical thinking" and "problem solving" in front of their administrators.