Do any non celebrity characters in The Simpsons get older over the course of the series? I know that most characters stay the same age but want to know if anyone bucks this trend. I am asking about people in episodes set in the present, so flashbacks and flash forwards don't count.
I'm not counting characters who died and stayed dead.
I'm not counting celebrities as that is covered in this question: Have any celebrity guests noticeably "aged" over the course of their appearances on The Simpsons?