Sometimes I pick up toys for my kids from charity shops that I haven't heard of and it kickstarts an interest in something from me. This happened this week. I saw a couple of interesting looking guns in a charity shop on Monday and went back on Tuesday and fortunately they were still there. I picked them up for about £2.50 each or slightly less. I just thought they looked cool - I didn't expect them to work.
After the purchase, they were split between my son and his friend and so they aren't a pair anymore. However, they could get together and play them some time. Anyway, I did some research after the fact and discovered they could be linked together to play various multiplayer shooter games. Infact, they seem pretty awesome, if only I'd known at the time of purchase I might have had more respect! They were not sold with the original goggles and rumble packs though - that would be expecting a bit too much and I'm not sure that the goggles really add anything to the experience.