There are some small rock towers being built at our local park along the shores of Lake Saint Clair - I've been tempted to join in because there are just so many nice flat rocks and it looks like fun. Maybe next time we go for a walk I'll have to have the kids help me and we'll take some pictures of what other people have built. There are so many spiders down there that I've always been a little concerned about moving the rocks around, but that's nothing a good pair of garden gloves couldn't fix.