Build your own Birdhouse Kit, Teachers, this is a great and affordable way to get your kids Design, Building while creating something practical and at the same time beneficial for the environment, Perfect size for a chickadee or finch, Comes unpainted, Assembly required
Cartesian Diver Set, Demonstrates the transmission of pressure by a liquid, the compressibility of gases and Archimedes Principle. The set consists of a Cartesian diver, glass cylinder, a rubber diaphragm and instruction
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