There is a creek at Warren Dunes State Park that should be part of everyone’s experience at some point. It’s exit into Lake Michigan is not too far a hike. (Though, as it kid, it sure seemed further to me.) If you want, you can hike a ways back into the woods and find an area of clay to enjoy. We enjoyed it by standing in it, but other beach-goers (in particular teens) enjoy it by covering themselves head-to-toe. Someday Nate will be that teenager, I’m sure.