Grow a living room in your backyard

Isn't this awesome? Readymade has the directions for actually growing your own grass couch in your yard here. I now live in an apartment, but would love to grow a couch or chair in my yard. What a great thing for the kids to play on. It would be the 'you have got to see this' of all your friends.
Just when I think I've seen everything....hmmmmm. But be aware - couch may require mowing and weed pulling, lol.