A simple form gyroscope for demonstrating the principles of rotation, attraction and equilibrium of bodies in motion. Consists of a metal gyroscop...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
“Invisibles” is a much enjoyed feature in the children’s magazine, Nature Friend Magazine. Now, here is a 32-page collection of Invisibles. See if...View full details
32 pages containing illustrations and name identifications on every page. Reinforcing the alphabet becomes fun when lions and tigers and bears...&a...View full details
32 pages containing illustrations and name identifications on every page. We put your favorite pets into an alphabet dot-to-dot; creating a pet sil...View full details
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