I don't build anything, but I will add this little project to this thread in case no one saw it anywhere else. We lost a big old weeping cherry tree several years ago. Storms can really take away things you love within seconds and this tree was a landmark tree it was here so long in front of our old old barn. The stump was not removed for some reason, I think it was because at the time we removed the tree and did not have a stump grinder, and that old stump sat there just reminding us of the tree and looking ugly.
One day I threw a few buckets of soil on top of it and planted a few chunks of sedum. I kept adding to it when I had used soil from the greenhouse, each time adding a bit more sedum or hosta or whever I could find. Here are some pictures of how it looked and how it looks now.
2013
May and June of 2014
August 2014
It cost nothing to cover the stump, the plants were from other plants here on the farm and the soil was being recycled from the greenhouse dead plants. I am sure other people have done similar things with old stumps, but I just thought it was amazing how it has become another pretty garden to look at when not too long ago it was an ugly old stump.