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!
See the solar system in action!
Find the hidden crystals when you open your own geodes from this fun set.
Build over 100 exciting electronic projects with this easy to use kit!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
Use this laser pointer for any professional presentation!
Easily assemble a working alarm motion detector!
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