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. Want to have a conversation with someone who"s not right next to you? Of course, you can use a phone--but why not be inventive and use the sun to create a form of Morse code? Just catch the rays with a mirror and alternate long and short bursts of light by covering the glass with your hand. Plus: make shadow puppets, silhouettes, a mirrored kaleidoscope, a periscope, and more.