See the light–with experiments that show how it casts shadows, bends, refracts, and lots more. With an outdoor lamp, shine a light on scary Halloween cutouts. Put wax paper over a flashlight to see how it affects the beam’s strength. It’s a magical trick of the light that makes paper butterflies seem to float. Plus: make a sun print, shadow puppets, silhouettes, a mirrored kaleidoscope, a periscope, and more!