When I was a kid (about 6 years old) we were at the air base my father worked at. I played a pinball machine and got a free game - yipee! Then my parents told me I should not play those machines because they were "gambling" machines. After I played my free game I wandered around for a few hours because I had no more money. Just before we left I went back to that machine and it had a huge quantity of free games on it apparently left by someone else. I never did get to play them. Grrrr.