The Lens Set is an excellent set of 6 unmounted glass lenses with round edges. Each set includes one each of double convex, plano-convex, concavoconvex, double concave, plano-concave, and convexo-concave lens.
These are 50mm diameter.
Find the hidden crystals when you open your own geodes from this fun set.
Great reference card for chemistry and physics students.
A combination of three of our great discovery toys, all in one package!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
High-quality green laser pointer projects a green dot up to an incredible 2 miles away.
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.