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.
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.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.
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