Always be willing to take time and listen to the kids, not just teach the lesson. We had a new kid one week in Sunday school who was visiting his grandmother. He was sitting alone while we were playing on the play ground, so I sat and talked with him. It turned out he loved Star Wars; and before he left at the end of class, he gave me a finger puppet that he had made. He called it a "Darth Paper". I keep it because it reminds me that just taking time to sit and invest in someone can make their day better.