cant get any easier than a two piece stained glass christmas tree ornament.  If you like to "paint" on glass, even with window cling paints, this can be identified with a name or year.  Pattern comes with tree at 6 inches in height, but can be enlarged or reduced to fit your abilities and constraints as well. Basically this is free in the Nov 2015 newsletter, but listed here just to cover costs for DSL and paypal charges  (LOL)  tree and tree trunk... thats it.