They All Seem So Young
In a batch of comic books I got a hold of recently was Giant Sized Fantastic Four issue six (A reprint of FF Annuel #6), which ends with the birth of Franklin Richards, the son of Reed Richards (Mr. Fantastic) and Susan Richards (The Invisible Woman). The date of the original comic was 1968, which means that Franklin is a few years older than I am... Right now in the comics Franklin is a teenager. His age had jumped around a lot over the years and we have seen various older version of him from alternate futures a few times now. It seems he was trapped in the age of a little kid somewhere between four and eight years old for several decades, ageing and de-ageing in that range as needed. In the last few decades, they decided to let him hit puberty finally and have not trapped him at that age for the time being. So a few decades later he gets a little sister, Valeria Richards, who originally would have been born in the early 80s, except this is the comic book world and she was miscarried