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!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
Learn about hydrogen fuel cells with this incredible kit!
See the solar system in action!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
Comprehensive collection of 30 fossils.
Every kid needs one of these spheres!