This is amazing, my old man constructed this. First it was a created to hold a big square water container on top. Then he decided he would create a backyard tree house out of it for our grandkids. Well spring planting time came and he incased it in plastic sheets and bent small pvc pipe on the top to create a dome. We have started all of seeds in it and it works great. It is very easy to move around the yard for mowing or better lite. Next he is going to hang screens inside it and create a vegy solar drying house. He needs to patent this, it is so versatile.