This great rock tumbling kit comes with everything you need to polish stones and gems. Tumbling is easy: just place a few rocks or minerals into the tumbler with some grinding powder, and start tumbling! The grinding powder duplicates the erosion process that takes thousands of years in nature. It also comes with jewelry-making accessories to display the rocks, and is excellent as a birthday present or Christmas gift.
Check out this high-quality gyroscope!
Build your own 10 inch kaleidoscope with this great kit!
Use this kit to introduce electromagnetic principles in the classroom setting!
Working model representing the sun, earth, and moon and their relationships.
This classic desk toy will keep you amused!
Build a hand that realistically moves its fingers using shape memory allow technology!