This 2003 movie appears to be becoming a holiday tradition of sorts, receiving lots of airings since Thanksgiving. And why not? Will Ferrell is goofily giddy as the overgrown elf who leaves the North Pole to encounter life of a less sheltered sort, and Bob Newhart, as his elf boss, is a delight. So, by the way, is Zooey Deschanel, who showed off her lovely singing voice here long before she began releasing CDs as half of She and Him. And did you know that the voice of Leon the Snowman was provided by Leon Redbone? I didn’t, until just now.