I went on this ride 6 times in Feb., 2004. I am 60 yrs old. I was with my family of 10 and the 7, 5, and 2.5 year olds did not ride.
I thought it was the best amusement park ride I ever rode.
This is not a scary ride like Dinosaurs. It is strictly a physical experience, and should be exicting to kids who don't easily get nauseated. Four years ago, my then 8 year old grandduaghter vomited after a day of Tower of Terror and Rock and RollerCoaster. This last visit in Feb. she rode them all multiple times including Mission Space and had not ill effects (and in fact loved Mission Space).
Mission Space has received an exagerated amount of negative hype. One of the times we went, there was a 50 year old lady and a kid of about 9 years old. They were both first timers, nervous cause of the warnings, and after the ride the 9 year old said something like> that's it??" I never saw anyone get off sick,
Thee hype scares some away out of line with the reality of the ride, which reality is fun and exciting.