The Wonder Gloves
Uncle George is showing Little Johnny, his nephew, the pair of boxing gloves he claims enabled him, when he was the janitor at a training-gym, to beat up the bullying prizefighting champion. Little Johnny scoffs at the tale until the 'wonder gloves' gives him a spanking.
Directors: John Hubley, Robert Cannon
Writers: Bill Danch, Bill Scott
IMDB: tt0153908