He and I came up with an analogy that life is like a gauntlet and that bad things will come our way. But if we stick to the commandments we could get through to the other side (returning to Heavenly Father).
But sometimes we'll fall down anyway... which is why we have the atonement. We can repent and keep going.
The boys especially loved it when it was mom and dad's turn to run the gauntlet! We had a great time and hopefully learned something.