I have a Hyperlite State 135 and last year one of my 12 year old twin boys decided on a lark that he would try it. He got up first try and has being using it ever since. He was under 100 lbs then. My other son tried it and liked it too. They use it more than I do now.
(I mostly slalom.)
2005 X2, Viper Red, MCX, OJ TZ-X5 prop, PPass, rear 750 sacs, KBS, IBS, Bennett Wake Plate, custom wake shaper
(previous) 2001 X5, 1991 TriStar 190