To a casual observer, a rock and a mineral appear to be very much alike. However, to a geologist, a rock is something much different from a mineral. A mineral is a combination of two or more elements, while a rock is a combination of 2 or more minerals. You can learn more fun facts about rocks and minerals by investing in this collection. Sixteen common rocks and minerals are featured on this 4 X 6 card, along with interesting information included on the back of the card.
Get swept away by this fantastic robot kit that uses vibrations to move!
See the solar system in action!
This SUPER Erector Construction set is one of the best you'll find anywhere!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
Easily assemble a working alarm motion detector!
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