Sail Car Activity single, Design and engineer a vehicle that is propelled by the wind, activity is perfect for early elementary, The Sail Car design allows students to quickly and easily experiment with sail shape, angle, and placement, furthest distance, travel the fastest
Knife Switch, Double Pole - Double Throw, Double Pole - Double Throwdurable Plastic Base Knife Switches That Stand Up During Tough Student Use. Poles & Knives Are Made Of Brass For Good Electrical Connections.
Double Convex round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, for educational uses, Size: 100mm focal length, 2in diameter and 8mm thick
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