So, I came across ornament/toy today that can do almost essentially what I want, but it would take some tweaking. Apparently Hallmark created a little xmas ornament in the shape of a cathedral radio..you turn it's little dial and you get radio static until you reach one of five or so "stations" that will play 4-8 second commercials or songs....then it turns it's self off. I am going to get one and take it apart and see if it can be changed....fingers crossed.