| http://www.w3.org/ns/prov#value | - This kit is packed with parts, including a beautiful, precision, brass-colored balance scale to measure mass, a hover puck, a jet car that really zooms, the components to make your own spring meter, an accurate to 1/100 of a second stop watch to clock speed, velocity and acceleration and the tubes, stoppers and inflation needle to launch both water rockets and baking soda rockets.
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