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the yellow plastic rim measures 8 inches in diameter and is attached to a plastic clip that hooks onto door frames or other edges
a streak plate to test color powder
they can be used in the water
This set includes three sleek wooden race cars in bright
Kids learn how to collect
Smithsonian Rocket Science halloween the yellow plastic rim measuresBlast off into hands on science fun with the Smithsonian Rocket Science Kit. Build your own reusable rocket, then launch it using simple chemistry (baking soda + vinegar) for a safe yet thrilling STEM experience. A perfect project for ages 8+ and an ideal gift for aspiring rocket scientists.