Before you mess with the next generation's scientists, definitely use this accessory to make your cave-person costume extra impressive! The molded plastic accessory is designed to look like an enormous arm or leg bone of some unknown being. There were plenty of large predators around, and all of them were hungry. A Simpler Time If the early humans had daily schedules, they would probably say something like "Morning: Try to discover fire for the eleven hundredth time.Big Cave Bone Prop They might dig it up and marvel that the First Digital Era apparently had plastic animals running around everywhere.