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What happens when two wave pulses meet in the middle? Send waves down a spring to watch them travel and interact.

With a straw, two craft sticks, and some rubber bands, construct a noisemaker called a Sound Sandwich and explore how vibration produces sound.

With a bit of PVC, a laser, a can/cup, and a small mirror, you can make a device that visualizes you voice or any sound transmitted into the cup/can.

Put a string around your head, and play it! Learn about vibration, sounds, and pitch.