Toilet paper tube, piece of wax paper, rubber band
Get an empty toilet paper tube and a piece of wax paper big enough to completely cover the end of the toilet paper roll. Secure the wax paper tightly onto one end of the toilet paper roll with a rubber band. With a nail or pen, poke a small hole in the cardboard tube near the end covered with wax paper. To play the kazoo, hold the uncovered end of the tube to your mouth and hum into it.