Back in college my friends and I had a bunch of bottle rockets so we went out and got some of those balsa gliders from the drugstore. We nipped the warheads off the rockets and hot glued them to the fuselages of the gliders. We staged them so when the first rocket lit up it would light the fuse of the next one. We tried single, double, and triple stage gliders this way. You wait until the fuse has burned out almost nothing and then toss it, the rocket kicks in and there you go. Most of them would veer off wildly and crash pretty quickly, and one did a spectacular immleman came right at us. The best was a three stage job that worked perfectly, it went on a nice climbing glide at a shallow angle and flew a couple of hundred yards out over the field we were doing this at. Good times!