Delroy Lindo didn’t know about the kids
Though you would never know it from the movie, Delroy Lindo had never worked with children before. And because he didn’t have children of his own at the time, he was intimidated to work with them. Either he really warmed up to the children or he’s a great actor, (well he is a great actor anyway). By the time the movie came out, he seemed like a pro at being a father to those kids.