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!
High-quality green laser pointer projects a green dot up to an incredible 2 miles away.
The Duncan Phoenix Diabolo features a stable, hard rubber shell that retains its shape.
Build your own windmill generator kit by recycling a plastic bottle!
View the glory of space with this hi-tech telescope set!
This classic device is used to demonstrate the conservation of mechanical energy.
This adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!