I've been riding skis since I was 14 and in ohio back then you had to be 14 to ride alone. The law since has changed. Now if your born after jan 1 1982, no matter how old you are you must take a boaters saftey course. Well I took this course this summer because my girlfriend was born in 82. So she had to take it in case we were ever to get pulled over. The course was pretty pointless in terms of saftey and boat operation in general. All it really teaches you are the rules of boating, and whats required to have on board a boat. That is all good information to know, but I think there needs to be instructions on in water operation aswell. I've always practiced "common Sense" when riding and I think if you respect the crafts, and ride smart you will be fine. I do think that todays watercraft are too big, and too fast for most inexperenced kids. I have a modded 06 rxp and I hate letting people ride it because its just to much to handle for people who have never ridden before. I think as far as kids go, if they can ride a 4 wheeler and dirt bike, then you can operate a jet ski aswell. They just have to be taught to use common sense and ride with someone older until there experence grows. I dont think they should be riding the stupid fast newer models though.