Yesterday there was a project on Kick flexible LED-display, which can be used not only as an information board, but as a bright accessory in clothing: the makers should consider using it as a bracelet (with Velcro Velcro) or belt. Each of the models hides a 2600 mAh battery and module Bluetooth 4.0, which allows you to connect to devices based on Android, iOS, Windows, OSX, Linux. Using a special application, you can send not only the sensor data, which may be important for athletes, but also a variety of animated images.
Read another very interesting article about alternative energy of the Sun, water and air.