You can't expect much from a movie that's been featured on MST3K and resides permanently on IMDB's bottom 100. Santa Claus Conquers the Martians has the kind of plot, direction, set pieces and acting that you'd expect to see in a junior high school play.
It's filled up with all the usual funny stuff you see in every 60s sci-fi b-movie: gratuitous stock footage, abducted children, terrible costumes and the dreaded tickle ray.
The film is in the public domain, so expect to see it on TV once a year on every channel trying to save a buck. Or you can google it and watch it from free online.