Super BF loves Moss. He has it all over. Apparently people on Pinterest love it too, because there are super great moss graffiti tutorials now. Everywhere.
Can of Beer
1/2 Teaspoon Sugar
Several Clumps of Moss
Blend in non food use blender. (I have two one for food one for crafts)
Pour in plastic container, grab paint brush. Go Paint. Mist often over the next few days and weeks while your masterpiece grows!