Have you had yours?
In my cubical at work I have a little piece of paper with these words printed on it: "Have you had your dirt time today?"
It is a reminder to me of the importance of getting outside and discovering and learning through being there, not just from a book or the internet. And it's not just about learning; the real message is allowing and making time to play, wonder, and just be outside. I think I may have to add one of these pictures to that quote now, to get a real sense of just how important that dirt time is.
These are two of my nieces and they get it; children usually do.