I didn't take a photo of it, but I bought a fossil digging excavation set at a yard sale a month or so ago. It was basically a large concrete block and the kids have to use special tools to excavate it from the cement. The kids really loved it, but if it would have taken them FOREVER if I hadn't helped out. After all, they really wanted to get to the bones and it was layer after layer after layer of material. After they collected all the bones, they had to clean them off and then assemble it. It was a great time.