This is one nifty piece of wall art; I can't imagine anyone not being impressed by it. Click TUTORIAL (above) to see it and see how to do it.
I do have one suggestion: if you use leaves as a temporary embellishment (snowflakes in the winter, tree buds in the spring, butterflies in the summer?), attach the embellishments to the wall with Scotch Poster Tape. This tape is repositionable and intended for items that will be removed from a surface.