The Peg Puzzle Player by Jongchul Kim is a music player comprising independent modules, each symbolizing different functions viz. play, next/previous song, volume up/down and LCD display. Place them each in their respective places on the cradle and they get recharged. Each module being connected by Bluetooth Piconet system is controlled by the main device to check the data flow and prevent data crashes. Just spread them out and play!
Thanks Jongchul Kim!