Intro. Finn was apparently abandoned in the woods during his childhood. He revealed that he went "boom-boom" (referring to making popo) on a tree leaf and accidentally bumped into it, which caused him to cry for a whole day until Margaret and Joshua (Jake and Jermaine's fathers) found him and decided to adopt him, growing up as Jake and Jermaine's adopted brother. Finn noted that he knows nothing about his biological parents
Finn was 12 years old at the beginning of the series and was growing up as the series continued. He served 13 years in the episode Mystery Train. In an interview conducted in Pendleton Ward in 2013, he mentioned that Finn was 15 years old. However, Ward stated that Finn is currently 17 years old. Finn appears to have been abandoned in the woods during his childhood. He revealed that he went "boom-boom" (referring to making popo) on a tree leaf and accidentally bumped into it, which caused him to cry for a whole day until Margaret and Joshua (Jake and Jermaine's parents) found him.