Moss Art

Moss-Graffiti-The-Coolest-DIY-Project-Ever-14

I saw this interesting idea via StumbleUpon, where you make a picture from moss on a wall as a two colour mural. I wonder if my wife would be interested in doing this? She is the artist.

There is a whole Wikihow article on how to do it.

The only things i’m wondering is, how hard is it to get off if you decide you don’t like it anymore?