Baby Rattlers.
When I was a kid there was a small hardware store a couple of blocks away. One day they set a large wooden box on a table outside the store with a sign that said “Baby Rattlers for Sale $1”. Cars were flocking in just to get a look at those baby rattlesnakes. but to their dismay it was only a box full of “baby rattles”, but many here in the South call them “rattlers” too.