Thank you very much for the reply, you were pretty helpful with the contribution to the idea to make the robot.
Lately we have been working on the mechanism that picks up the balls, but we have had some difficulties. Later on we will post a video on youtube.
http://img31.imageshack.us/img31/5907/img4665do.jpg
The picture above is a picture of the picking up mechanism. This picking up mechnism has problems. The main problem is trying to make the rubberband as you can see above stay still during action. When we run the rubber band, the rubber bands move to one side making the clump together in the end. Please post any ideas or any thoughts on the matter.
On a brighter note we have built a working shooting mechanism. We will try to have a video link later on to show how the shooter works in action.
http://img39.imageshack.us/img39/6172/img4668v.jpg