This is a neat little project to make over the weekend. It’s a rechargeable LED that you can wear.
The whole concept is that an LED can have it’s legs pushed through a piece of clothing and into the battery packs connector. With one of the leads bent over to keep it attached to the battery pack, the LED will light on the front of the clothing like a tiny pixel of light. For favourite clothing, a male connector can be soldered to the LED to make it a permanent part of the garment.
More on making a wearable pixel