Sky Sailing offers rides on gliders or skyplanes from the Warner Springs Airport.
These were rather expensive, but as a once-in-a-lifetime experience, they were worth it. My pre-teen went alone with the glider pilot, and actually got to steer the glider herself. The small one rode with Daddy and the pilot, and had a wonderful time. A camera mounted on the wingtip takes photos (included with your price!) for you to remember the trip. Beautiful area, very friendly staff, really a great experience.