Children and Family Films : Trying to Figure Out a Short Cartoon

Trying to Figure Out a Short Cartoon

Hi. First timer around these parts.

About two weeks ago, I was at a double screening in Los Angeles for "Creepshow" and "Trick 'r Treat" and, before each movie, they ran a vintage cartoon. I'm having trouble remembering what the second one was. It was about a child witch who arrives at a wizard's house because he's meant to babysit her, but it's around the same time the head of the wizards is testing him and he has to cheat to get ahead, but the child witch catches him and helps teach him magic.

Does anyone know what cartoon or that character was? Any help would be greatly appreciated.