Jump Jump is a mischievous elf who is only "no feet three inches tall". He was created by married couple Mary McConnell and Harry Hickox, who wrote and performed Jump Jump of Holiday House for New York radio syndicator Harry S. Goodman. In each episode the elf is told a fairy-tale by Mary Holiday, the mistress of Holiday House, where everyday is a Holiday. Jump Jump's voice is performed by an actor recorded at 33 1/3 rpm and played back at 78, which gives the elf a hard to understand speech, unless the actor speaks slowly and deliberately. (This reminds us of The Chipmunks, but less irritating.)

In the later serial, our hero Tim lives in an orphanage, where his friends worry that Santa will forget them. Tim leaves on a quest to the North Pole to get the answer from Santa himself. On his journey he meets Jump Jump, who takes him to Holiday House to meet Mary Holiday. Mary is worried because she hasn't heard anything from Santa either. She joins the quest, along with the clown Achi Paggli whose hair changes color to match his mood, a lazy lion named Sleepy Slim who naps more than he is awake, and the Poet who is forever rhyming. Eventually they reach the North Pole and learn from Santa Claus about the Ice Queen and her reindeer theft. The crew take it upo them selves to save the reindeer, if only they can get through the circle of blue fire surrounding her palace.