Invisible Guerrilla?

Unique posters seem to be a guerrilla marketing staple, but this one really catches your eye. It was intentionally placed on street corners of busy cities; I'm sure I probably wouldn't have noticed it until I almost stepped on the (fake) kid. Non-profits always seem to come up with really unique efforts that really hit home and make you think. I wonder what other tactics they've used-- they could probably do something with promotional toys that would have a huge impact because it ties in so well with children.