Jack (1996) - Synopsis

Jack Powell is an ordinary 10 year old kid... except he grows 4 times his age. Secluded inside his house for those many years, his wishes of going to a public school are finally answered. However, Jack finds that a boy who looks like he's 40 in 5th grade can't find friends as easily as expected. Still, as he proves himself to the world that he can play just like any other boy, he begins to make friends, and enemies.

Things complicate as a crush develops on his teacher and his best friend's mom falls for him, thinking he's the principal. Jack has embarked on the greatest adventure of his life but how long will it last?