Worried Pet Rocks
I recently did a swap with another Etsy seller (they have a neat list of people who want to trade on the Etsy forum), and she requested half of her Pet Rocks to have the Tom-stone faces. I think they turned out really funny, they look worried!
I've been listing Pet Rock "piles" and "pairs" along with the single ones in my shop. They come with group discounts, ha ha. Last week I added a worried pair.