Learn how to hand sew an LED matrix and control it remotely from a webpage. It consists of 36 LEDs and uses the MAX7219 LED driver chip. The LED matrix makes up the screen of a retro T.V. embroidery design.
The Edison acts as a server which hosts a simple HTML page that has 36 buttons, corresponding to each LED. When a buttons is clicked, it's LED mate will turn on. Hit the Reset button on the page to turn all LEDs off. This allows you to draw whatever design you like. I didn't get to it, but I think a white noise button would be pretty cool.
This is a great project for getting started with socket.io and click events used to control hardware. As well as getting comfortable sewing with conductive thread and controlling LED matrices. This one may look a little tedious, but I promise it's quicker than it seems. If you really like meditative hand sewing and are decent at it, I encourage to go even bigger with the matrix.
 Bobbin of conductive thread
 9 volt battery
 9 volt battery snap
 Skein of embroidery floss (color A) : screen, antenna and legs.
 Skein of embroidery floss (color B) : T.V. body and dials.
[18" x 18"] Cotton muslin or other medium-weight fabric to embroider on. It should be a med-high thread count, not the cheap, mesh-like variety.
[5" x 5"] White cotton fabric
[5" x 5"] Batting
[7" x 7"] Carbon tracing for fabric
[4" x 4"] Craft felt
[18"] small diameter heat shrink tube
 3mm LEDs : 36 for matrix + 4 extra
Needle nose pliers : preferably round