6-Piece Optical Lens Set, 3", Double Convex and Double Concave Base_Octagonal Demonstrates the full light-to-electricity-to-motion chain

Demonstrates the full light-to-electricity-to-motion chain through a solar cell

Seventy-eight-piece molecular model set with 45 atoms and 33 bonds for building basic organic and inorganic structures

and inner ear sections support detailed auditory anatomy teaching at 3x enlargement for classroom visibility

sized for pool

101-piece teacher-grade molecular model set with 51 atoms and 50 bonds covering carbon

6-Piece Optical Lens Set, 3", Double Convex and Double Concave Base_Octagonal Demonstrates the full light-to-electricity-to-motion chainSix piece 3 inch optical lens set combining three double convex and three double concave glass lenses at 200mm, 300mm, and 500mm focal lengths for comparative refraction experiments.