Ohbaby! Inc produced a set of novelty Sesame Street signs in 1997.
One small sign shows Elmo and the words "Don't Tickle Driver!", a reference to the Tickle Me Elmo toy craze of 1996. The sign has a suction cup and can be mounted to the inside of a car window.
A larger sign shows a silhouette of Big Bird, and the legend "Bird Crossing".