Follow these step-by-step instructions to light up your Easter eggs:
1. Cut a half-inch diameter hole in one end of an egg.
2. Empty the contents of the egg, and dry the inside of the shell.
3.Tape three LEDs of the same color to a lithium coin battery.
4. Put a few pieces of cotton into the shell to diffuse the light and to keep the LEDs inside. Put the LEDs and the battery into the shell. Dim the room lights to get the full effect.