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Science & Kids Project
SOLAR OPERATED BOAT. 1.5V SOLAR CELL INCLUDED. SIZE APPROX H: 4" - L:
10" - W: 6" (AGE GROUP 10 ..
simple working model of a hydraulic brake system. The hydraulic brake is an
arrangement of braki..
project shows how disc break works...
Do -it - yourself kit to find out how much rain falls where you live by making your own rain measure..