Release your creativity and get a good workout at the same time with Drawing Machine #1 by Joseph Griffiths. Part performance art, part kinetic sculpture, this peddle powered apparatus consists of a stationary bike that drives a series of articulated drawing implements across a canvas. [via designboom]
Now, that looks pretty nice, although the stationary bicycle is pretty basic. But no wonder because you would not want to stain one of these: http://spinning.com/en/webshop/product/809/spinner_pro That one is expensive!