At the NCE, I ran into an interesting pediatrician who, among other things, handed me some of these stickers:
I think they are great and I've been slapping them up from place-to-place (within the limits of the law of course...mostly). He mentioned, iirc, that he is about to print up another run, so if you'd like your own set for your office/patients/town for a low-low price, get in touch with him!
Before I go, a quick shout-out to Dr. Kevin Johnson, who has been elected into the Institute of Medicine of The National Academies. Great work!