Excavate 3 Real Shark Teeth Fossils from the Ocean’s Most Fearsome Predators! National Geographic’s Shark Tooth Dig Kit lets children dig up fossils from three different species of shark. A full-color learning guide is packed with amazing shark facts and pictures, too. Kids will love identifying the teeth of the sand tiger, otodus, and crow sharks, all while learning about what make sharks the ocean’s most feared predators.