Teach Me Something in Five Minutes?

If you had to teach someone something in 5 minutes, what would it be? More specifically, imagine that you are in an interview and they allowed you to bring in some materials such as paper, scissors, what-have-you. It should probably be fun and interactive to keep them interested in you as an applicant. Some things I’ve come up with are origami, tie-dye, knot tying, knitting…