It’s not just the activities and games you play with your child that develops her. The way you play them makes a big difference. The following ten principles will help your child become an independent minded, thoughtful, self-motivated 21st century child. 1. Ensure success That doesn’t mean that setting up games and activities which are too easy. It means you should gradually extend the challenges – challenges she can solve, often on her own, with a bit of thought and effort.