Laser Classroom Tech Light Lab Optic Science Experiment Kit Hands on Science Activities around Light, Color and Optics Contains 3 LED Light Blox, 3 High Quality Glass Lenses, A diffraction grating and a protractor Comes with an Activity Booklet of 10 fun and easy science experiments for kids 8-12 STEM integrated science kit Observe light rays, colors, reflection, refraction, spectrum, diffraction