This versatile, comprehensive Ray Box Kit allows teachers to demonstrate all geometric optics principles to the whole class. The Ray Box and all-optical accessories can be firmly held to a metal chalkboard or whiteboard. The kit comes with a robust plastic box with a 12V halogen lamp, a cylindrical lens, a set of 5 slit diaphragms, a set of 7 color filters, a set of 7 color screens, two black screens, a set of 7 acrylic lenses, a plane mirror, a mirror with variable curvature, a rectangular reflection cell, and a power supply. Instructions included. 11”x12”x4”. Ages 13+