Whe I was little we had one of these:
http://www.megomuseum.com/startrek/commandconsole.html
It was a Star Trek toy that worked with these:
http://www.megomuseum.com/startrek/communicators.html
Basically it was a low-powered 2-way radio that worked on CB channel 14 (I think?). We could run around the neighborhood playing Star Trek.
Funny thing, though, was that the console was powerful enough to reach the nearest truck stop about 2 miles away, so my friends and I would listen to the hookers telling the truckers how they were going to give them good blowjobs, etc. We were so young some of the kids didn't understand what they were hearing and it had to be explained to them.
Fortunately our parents never found out about it or they might've taken the radios away from us. We wound up abusing the equipment until it stopped working eventually.