The two links above will take you to two places you can go to teach children the basic tenets of Christian faith. They contain short questions and answers regarding the essential teachings of Scripture. They are intended to spur on conversation between the teacher and the learner. The catechism from Desiring God also includes Scripture references and helpful comments.
You won’t regret going through this exercise as a family, just with your spouse and even as trivia with your friends. But this is much more than trivia. When embraced whole-heartedly, theology will rock your eternity!