4 years & up. The science of light has never been more exciting! This set comes with 8 experiments for young scientists to experience light in different optical alterations. Conduct optical science experiments including a Periscope, a Cone Illusion, a 3D Viewer, A Rotating Kaleidoscope, an Infinity Mirror, a Camera Obscura and others. Made for little hands and skill levels, learn about the laws of light reflection, refraction and polarization. Includes 53 pieces.