The Geauga lake Rockets were indeed built in the 20's. They occupied the location where the Boomtown is now, across from the Big Dipper Station. The Carousel was theRE AT one time too, as well as an Eyerly Rock-O-Plane (that was moved to Wyandot Lake in 1984) All 3 got moved for the Wave Pool.
The Rockert Ships were being refurbished in 1995, when the main tower got damaged. Fr some reason, they never put it back in. I have asked maintenance, and they want it back, as well as the park...will it ever happen? Probally not.