If you don't learn to laugh at life it'll surely kill you, that I know.
Go and play. Run around. Build something. Break something. Climb a tree. Get dirty. Get in some trouble. Have some fun.
Then let us go and be terrible.
For Peter's smile is a most contagious thing.
That's the spirit, one part brave, three parts fool.
And Peter laughed, and when he did, all the Devils grinned, because Peter's laugh was a most contagious thing.