I seem to recall during past trips that the Mindstorms classes are open to kids 8 on up. We'll be visiting this spring when DS is just 2 weeks shy of 9. But I just checked the Legoland website and the Mindstorms page says: " Guests ages 9 and above need to make a reservation the day of their visit." :-( Does anyone know if the 9 years is a hard and fast policy or would they be willing to make exceptions?