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Pendulum Bobs
An air bubble is generator by dipping the graduated tube out of and back into a beaker of water
A Ball and Ring Apparatus that consist of a brass ball
The base ten units represents the numeral 1
Deluxe Vibraslap with Adjustable Head for Experts Experiment Kit Pendulum BobsIncluded: Deluxe Vibraslap with Adjustable Head. Comes in a rich dark wooden color or a pleasant natural beige color. Makes its sound when the ball end is struck against the palm of the hand. This sound can be varied simply by rotating the sound chamber. They are a perfect addition to the classroom and also a great instrument to add to any music concert. Premium Quality: High Grade construction all the way through from the neck to the mouthpiece,
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