You can use this rubber stopper to contain liquid in test tubes and flasks. Fits tightly to prevent chemical leaks. Highly recommended for use in the science classroom or when displaying a science project!
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
Build a robot that's an artist too!
Use this temperature-controlled soldering station for a variety of soldering applications!
Find the hidden crystals when you open your own geodes from this fun set.
Check out this high-quality gyroscope!
Build your own windmill generator kit by recycling a plastic bottle!
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