How to Make a Bat Signal Light

Place a flashlight or spotlight face down on cardboard. Trace the circular outline of the flashlight face onto the cardboard. Remove the flashlight from the cardboard. You should have the outline of a circle exactly the same size as your flashlight's face on the cardboard. Cut the circle out using scissors or a razor knife.

Sketch the bat symbol directly onto the cardboard. It might take several attempts to get it right, so prepare several cardboard circles. Make sure the tips of the wings touch the outermost part of the circle on either side. Once the bat is completed to your liking, cut it out using the razor knife or scissors.

Place the bat cutout directly on the face of the flashlight, and trim it as necessary to make it fit securely. Use tape to secure the bat symbol to the flashlight. The tape can either be affixed to the bat and then onto the side of the flashlight, or the tape can be connected to itself to form a sticky-side-out circle and placed between the bat symbol and the flashlight. Make sure the bat symbol is securely attached.

Turn on the light. You will be able to see your bat signal.