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Matraca
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In this activity, learners create a traditional Mexican noisemaker (a matraca) using cardboard, craft sticks, and a wooden dowel.

Cactus Needle Phonograph
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Build a phonograph record player using a cactus needle, a record, LEGOs gear box, and a piece of paper! This activity uses a Pico Cricket to turn the motor.

How to Make an Audio Tape Bow
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From this How To slide show, you create an Audio Tape Bow that can play distorted audio sounds by running it across a tape head.

Resonant Rings
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Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces.