I am trying to attatch my IR circuit but I dont know if it is going to work. So if you want it give me your e mail and I will send it. Thanks for everyones replies. I should have specified that I am working with a small model. The street is only four inches wide, and the cars will be hot wheels. So a strobe system might work, but it could prove to be hard for such a small model. I think the sound may work. Does anyone have a good schematic for this? Thanks.