The Walnut Player is a strange concept design for an MP3 player, but it does have a reason behind it. We’ve all seen those Chinese exercise balls that you roll in your palm as a form of exercise, and the Walnut Player is designed around this concept, allowing you to keep it charged by just rolling it around in your palm. It’s also designed to be usable by the visually impaired too as it sports Braille writing on the sides of the player and uses a single button and finger-pressure to interface with the user. It’s a pretty neat idea, and we wouldn’t mind checking it out if one happened to turn up at a store nearby.