"Traffic Light" necklace

That's a necklace. It looks like traffic light. In holes you should put leds. There is space for 4 leds: 2 red, 1 yellow and 1 green. At the down is hole for switch with 4 switches (one for every led). The necklace is powered by two AAA bateries (there is some space for springs). Traffic light is closed by tailgate. At the top is catch for neck-chain.

You can use leds two ways:

1. To show how do you feel:
   up red & down red - very negative emotions
   down red - negative emotions
   down red & yellow - a bit negative emotions
   yellow - normal emotions
   yellow & green - a bit positive emotions
   yellow - positive emotions
2. Choose which leds look best and switch them on.

If you have some more ideas how to use that, please share it with others in comment :D