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!
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
This is a classic demonstration toy of the powers of magnetic fields!
Build 14 assorted solar robots, some of which can travel over water!
This caffeine molecule mug makes an excellent gift!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
Build your own windmill generator kit by recycling a plastic bottle!