In this activity, learners explore the size and scale of dinosaurs. Learners listen to "The Littlest Dinosaurs" by Bernard Most. Then, learners estimate the size of a Triceratops and T. rex by measuring and comparing the dinosaurs to known objects. Learners also use a hallway or go outdoors to create a full-size depiction of scale of the dinosaurs by predicting and measuring how many learners would have to lie across the ground head to foot to match the size of the two dinosaurs. This activity is featured on page 18 of the "Dinosphere" unit of study for K-2 learners.