The NSI Smithsonian Super Dig science kit #52391 combines the Smithsonian Digging up Dino’s T. Rex kit with the Smithsonian Rock and Gem Dig. With two blocks for digging, young paleontologists can learn about the evolution and extinction of dinosaurs as they unearth a replica skeleton of a T-Rex, and switching hats, young geologists and mineralogists learn to identify the properties and formations of rocks and minerals.