I'm learning a lot via Waldorf parenting resources, blogs, books etc. A variety of nature advocates would also point us to natural materials and playing outside in authentic ways.
Enter the much-desired tree stumps.
I don't know if I'm all done in that I think I want some wider ones for bigger bottoms :), but they look open to me. Loads of potential. I hope the girls are interested in playing with/on them. I see so many possibilities for parts of fallen trees...
My next step is to learn to treat the "stumps." I'll post some other images and links in a few moments to give a broader concept of what I'm interested in with the stumps/logs.