That's Boy Meets Dog.There was a looney toons type cartoon where this boy's father was mean/rude to him and sent him to bed or something early, i forget. Anyways, the boy dreams that his dad is put into this machine and turned into a baby, diaper and all. I don't remember all the details, I just remember that he was turned into a baby. Anyone know what I'm talking about?
There was another Little Lulu episode where the girls steal the boys clothes and leave them only diapers to wear. Then the whole town finds out about it. Unfortunately, I haven't been able to find it anywhere.Also there was an episode of Little Lulu(can't remember her name) I think it was, this girl with pigtails who was turned into a baby in one episode too.