I think I mentioned this in a previous post, but one of my primary responsibilities at the nature center is working on the new children's playground made of natural materials, dubbed (rather unimaginatively) the "Nature Exploration Area." The NEA features tables and chairs made of tree stumps, a giant bird's nest constructed of twigs, a snake-shaped path fashioned out of stones, and lots of other good stuff.
Details of the above sign:
"Tree cookies" advertising the various features of the NEA: