This steel hooked weight is painted with black enamel and is accurate to +/- 1%.

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This high speed vibrating electric motor has a speed of about 9000 rpm at 3 volts.

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These replacement carbon discs are designed for use with the AC Spark Recording Timer. 10 per pack.

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Home Science Tools 4-pack AAA batteries, 1.5 volt, alkaline. Great for electricity and circuit projects!

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Set of six glass lenses used to demonstrate optical properties.

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Classic demonstration of the conservation of mechanical energy.

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Shoot a 25-mm steel ball from a barrel affixed to a moving cart & watch in amazement as it drops back down into the barrel! This classic, memorable ballistic demonstration provides kids with an unforgettable intro to physics.

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