Science Museum Oklahoma Educator Calen Cavallaro holds half of a 3D-printed skull belonging to the Acrocanthosaurus, Oklahoma's State Dinosaur, at the "Dino or Not? The Ultimate Prehistoric Showdown" program at Tecumseh Public Library on July 16. In addition to looking at replica and real fossils, kids could choose paper body parts and create their own dinosaurs. Photos by Natasha Dunagan, Countywide & Sun