I made a really neat purchase today... Went to Radio Shack looking for something that I couldn't live without. They had a Swann Wireless Security Camera, called the MicroCam II. The camera is about the size of a quarter. It uses a 9 volt battery. Has a stand that is about an inch tall. I put it in one of my gondolas with the battery. The reciever is 2 3/8" x 4 1/2" x 1". It plugs into the video input on a TV. The cost was about a $100.00. It's really neat to see what your layout looks like from the trains, and adds a whole new dimension to operating when you can actually see everything as the engineer does. When I figure out how to do a video capture with my computer I'll try to post a pic or two.