Eye Model, Rainbow Symphony ($11.95), Hobby Tron ($32.50)
Mind's Eye Optical Illusion Kit , Hobby Tron ($56.95) and Steve Spangler ($69.95)
Equilateral Glass Prism, Edmund scientifics ($7.95)
Plastic Prism, Steve Spangler ($8.50)
I would really like to find a cheaper 'optical illusion' kit. Any ideas?
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