Growing up in the late 60's early 70's, I spent a fair amount of time reading comic books. I don't remember much about them, but I do remember several of classic ads. Of course, there was the Charles Atlas ad where the beach bully kicked sand on the skinny boy and his girlfriend. But the ad that I remember the best was the "Magnificent Marvelous Money Machine". It was a wooden block with some rollers in which you would put a one dollar bill in one side and a five dollar bill would come out the other.