I liked the Jim Carrey movie but there is nothing like the original cartoon.
There are actually quite a few Christmas movies that come on that are geared from children and I remember as a kid one TV movie that came on every year and I loved it. The Night They Saved Christmas! I remember stay up late to watch it and being allowed too.
I watched it last year and I have to admit from my adult eyes it is a bit silly but I still love the movie. Watch it if you like. It isn't the best quality but it is really cute.
But even now one movie that was geared for kids that still touches my heart and I love watching year after year (off the tv - why don't I own this?) is Prancer. One of the best Christmas movies I can remember.