LED throwies

Based on: http://chemistry.about.com/od/madscientistlab/a/led-throwies-led-glowies.htm

Instructions for making your own LED throwies

LED Throwies are glowing Light Emitting Diode or LED devices, that you can toss and stick onto any ferromagnetic surface. The LED project is easy and fun.

Materials for LED Throwies

• LEDs (Light Emitting Diodes)
• 3-V batteries (note the common 1.5 V batteries aren't powerful enough to light an LED)
• Small magnet
• tape

Make LED Throwies

Examine an LED. Notice how one prong is longer than the other. Now look at the battery. The smooth flat side is the positive (+) side, while the side with the ring is the negative (-) side.

Insert the battery into the LED with the long prong of the LED on the smooth positive (+) side of the battery. That's it! You've made an LED glowie! You can use the LED glowie for any application where a little light would brighten things up.

Now, if you want to make an LED throwie, tape a small magnet onto the positive (+) side of the battery. Toss the LED throwie at your refrigerator or whatever.