http://weavesilk.com/ is a site where you can use your mouse or a stylus (if you have a touch screen capability) to draw using color stokes. The special and unique thing about weavesilk is every stoke you perform it will make a symmetrical stoke for you. So in a sense you only need to draw one half of a picture. Where the symmetrical line is in the middle of the page.
Here is a video on some silk art drawings below.
Go check them out here and start creating something cool. It does take practice as the style is unconventional. But it is pretty cool.