I stumbled upon a reference in Tricycle magazine to a non profit Buddhist group who is making small inexpensive badges (punk tradition) but with Buddhist pics and themes. They are great and fun. The badges only cost $1. The theme pics range from Zen (the enso, Bodhidharma) to Mahagosananda and one is a memorial to a monk who immolated himself during the Vietnam war. I have given them as gifts to Buddhist friends and the local Tibetan group is giving out the 'merit' badge to the kids in their kid study group. My favorite is a badge that looks like a car gas gauge with the indicator pointing to E for empty. It is called Shunyata--always empty all the time. Contact is Buddhabadges.com