Prep & Landing and it's sequel Prep & Landing: Naughty vs Nice are basically CG animated shorts that were produced for Christmas TV viewing. Each designed to fill a half hour time slot with commercials; they come in here around three-quarters of an hour in length total. Which is probably just about right for their storylines and for a younger child's typical viewing pattern. Needless to say, either one is suitable for families with children of any age.
The storylines are simple but fun. Misfit elves going out ahead of time to prep Santa's landing spots on roofs all over the world. No need to get into more details than that. The sequel is a little more complicated as sequels tend to be, but still retains the same basic pattern. It's not the best family christmas show in the world; but it's not too bad either. The kiddies will have lots of fun and there's just enough adult humour in there to keep their parents entertained. Provided you go into it not expecting a top flight theatrical release or running time, you'll be fine.
Three stars for adults, Four stars for the kiddies!