All sound is made up of vibrations (rapid back-and-forth movement), which produce sound waves that travel through the air to our ears. When you play a kazoo, air carries the sound waves from your mouth down the tube, making the waxed paper vibrate. You can feel those vibrations if you touch the waxed paper. With this "Fetch!" activity, make an instrument that anyone can play - a kazoo - and get the buzz on sound vibrations!