Robot head

This is a head I originally designed to use on robots. It can shoot ping pong balls from the mouth and move his light eyes.

Although, I never used it in an other robot. Instead, I have it online on Livebots, a platform I'm creating for having interactive robots that people can play with through the internet. Go here and try it for yourself: http://livebots.cc/Robot/View/11

I wanted to make a cover for my Ping Pong Balls Cannon, so I started with a 5L water bottle:

Covered it with kitchen paper soaked in white glue:

 Added some paint and cut the eyes holes:

And finally added two halfs of a plastic ball as the eyes: 

About the electronics, I used a motoruino which controls the mouth RGB LED, the motors and servo of the cannon and the eye's pan and tilt servos and white LEDs:

Here you can see a colse-up of the eyes system:

The PVC parts files are available here: http://www.thingiverse.com/thing:32834

 Any comments or suggestions are always welcome! :D