Slate (AI)

I have been making a world of little stone beings. The one I am thinking about now is called Slate, and he predicts the weather like animals do because he notices little shifts in the air and things like that. I sculpt the beings from polymer clay, and take pictures of them. I use natural items for accessories. Slate has a personality like the Blue Collar Comedy Tour- rural blue collar southern no nonsense. I would like him to have a baseball cap made from nature items, but I’m not sure how to do that or what to use. What would you suggest?