Middletown’s boys and girls this Christmas probably will move through the Rex Mars 25th Century Space Academy rather than the wild west bridle academy. Cowboys and their fighting horses may be neglected for Earthmen and their flying saucers. The 1953 Christmas line of toys basically is hanging to the television trend. And that's moving in the yet-to-believed-in centuries. There are strong exceptions, however, for a glimmer of Hopalong still can be seen and toys that mimic present grown-up doings are still prominently placed on local store shelves. The Space Academy, among this season's new toys, features fierce frogmen, men from Mercury and two flying saucers. It's priced in the $5-$10 range...