Dear all,first of all, hello to all of you, I'm new to this site, but I've already seen some wonderful things on here, and they are a true inspiration source for the projects I'm working on during my study as an Industrial Designer.I've got a question about a concept of mine, which I will explain briefly to give you an understanding of what I'm trying to create:When playing a sport, let's take football (by which I mean soccer) there's a ball. My idea is to make the ball represent the ball possession (or actually the ball passing between players) of the teams. For instance, you have a blue and a red team, and what I want to do is make the ball color almost entirely blue if the blue team is in ball possession all the time. This way people will be more stimulated to play with eachother, passing the ball to eachother instead of scoring goals individually.The way I want the ball to change color, is by making it detect when it's being kicked, by a football shoe (which has to have some implemented technology as well). So everytime it's being passed from one player to another of the same team, the ball will color more blue or red. I need some help with the technology as I'm totally new to this aspect, 1. How to make the ball change colors? (LED's, or optical fiber: http://www.imtech.nl/SiteContent/EUPortal/Images/ImtechNV/newsroom/succes/17%20glasvezel.jpg, or any other suggestions?)2.How to make the ball communicate with the shoes?One thing I've been looking into is RFID - chips/reader, http://www.youtube.com/watch?v=PaNnOHSJ-cQ, and then make the RFID-chips with a very limited range, so that only when the ball (with the reader) is close enough, the reader will detect the chip.But this seems like a last option, and I actually want something better.What I basically want is that when the shoe and the ball touch eachother, the coloring will happen. The requirements are that the shoes, must contain unique information so that the ball will know on what team that shoe is, another thing is that it can't be fragile, as the ball will be kicked by the shoe.Now as I'm fairly new to technology, I don't expect to build something with the best technology possible. As I have to write a final report, I will just present the technology idea in it. But it would be great if I could actually show an interactive prototype version of my concept. Therefore, if you have any suggestions, please write down the best possible way to create this, and a probably less perfect way that I can demonstrate (I'm willing to learn a lot over the next few weeks).Thanks in advance!