Grover, Elmo, and Rosita are imaging that they are Paleontologists, scientists who dig through dirt and stones to find fossils. Chris explains that fossils are what are left of a plant or an animal that lived a long time ago. The first thing they find in the dirt is a colorful, metal soup ladle which Grover thinks is a bone from a dinosaur. Next, they find two clothespins that Grover believes came from dinosaurs, as well. Elmo and Rosita find a bunch of other things, too. Chris breaks the news to them that these things are not fossils, because not everything old that is found in the dirt is a fossil. Grover is disappointed that they have zero fossils and that he won't be able to build a dinosaur out of what they found. Elmo suggests that they build a dinosaur even without fossils. Chris adds that they can use what they found in the dirt to build a dinosaur model. First, they can design a model, which means to think about and plan to put something together in a certain way before you build it. Elmo thinks the ladle looks like a dinosaur's head, Rosita thinks the spring looks like a dinosaur's tail, Grover thinks keys look like a dinosaur's arms, the spoons and clothespins could be legs and feet, and the xylophone could be the dinosaur's body. Then, they put it all together and create their very own dinosaur model. They decide to name it Barbara!