I got the basics working yesterday so I can at least throw fireballs at a target and they explode if they hit it, could easily be turned into a contest type carnival games/sports type games for kicking a field goal, soccer ball, etc To run it just takes a sensor ($175) and a laptop running windows that you can connect to a larger TV/display. I think it would draw people towards a person's booth if they have something interactive like this. What do you guys think? I'm in a crammed space testing, if I had room to move around and be further from the sensor it would work with leg movements but I have it pointing up at my upper body so it's not the greatest angle, would work better straight on. I'm using an Asus xtionpro live sensor rather than a kinect. When the new kinect comes out I'll give it a spin because it supposedly is way more sensitive and senses finger movements accurately. It can read 2 players simultaneously but it's kinda hazardous as by myself I've smacked my hands on numerous items spinning around lol. I use a library called OpenNI to use the sensor's input in a game engine, nothing microsoft related in the entire setup other than windows and it can run on linux as well(laptop with ubuntu for example).