The beauty of this appeal by Oro Verde Rainforest Foundation is its humble low-tech innocence. It doesn’t smack of big budget glitz, high-tech digital manipulations, and pre-launch market testing. The idea is everything. Its charm is in its simple, direct, homemade look. A high school student could have produced it… but didn’t.

Actually, the campaign was created by ad giant, Ogilvy & Mather, in Frankfurt, Germany. Hand-written placards were posted on more than 600 trees in Germany and helped OroVerde raise cash donations by more than 27 percent.