Modding Laser Tag Gear?

digitalsushi writes "With summer here again our thoughts turn to the outdoors, and for two years, my peers and I have tried to find plans online for augmenting our laser tag gear to make it more realistic. We're not engineers, but also figured it can't be that hard to do something with some kind of infrared laser to decrease the beam width. What other sorts of inexpensive things could be added to our gear to make it more interesting? We're using the popular Laser Challenge V2 kits, but any brand at all would be interesting."