What the box says:  Thirty-two-year-old Sonny Koufax (Adam Sandler) has spent his whole life avoiding responsibility.  But when his girlfriend dumps him for an older man, he's got to find a way to prove he's ready to grow up.  In a desperate last-ditch effort, Sonny adopts five-year-old Julian (Cole Sprouse, Dylan Sprouse) to impress her.  She's not impressed...and he can't return the kid.  Uh-oh for Sonny!