A Cartesian diver to make sink and swim. Explore properties of air and water while having fun. Make the diver and attach the “squid-looking” device...View full details
Fluids crystallize in the cavities of the rounded rock (nodule) creating the exciting surprise inside. Geodes are found all over the world, thes...View full details
This quality lensatic compass features a luminous dial in a heavy plastic case. Comes with sturdy lid with sighting wire, and fold up sighting lens...View full details
Kits contain owl pellets, plastic forceps, hand magnifier and bone sorting chart. A great item for introducing the basic concepts of archeology, co...View full details
What a strange device! But it sure is fun. When you grip the glass base, heat from your body warms the air in the outer tube. As air heats up, it e...View full details
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