Larsen Puzzle Happy Dinosaurs, 43 pieces. Dimensions: 36.6 x 28.3 x 0.4 cm. Here you see a colorful and cheerful collection of dinosaurs that lived on Earth millions of years ago. Some were huge and some were small. Some were carnivores, but the largest dinosaurs only ate plants. The long-necked dinosaurs, stretching their heads out at the top of the picture, are herbivores and belong to the largest animals that ever lived on land. The fearsome Tyrannosaurus Rex, which you see in the center of the image, had a large head and a huge mouth filled with many sharp teeth. The Triceratops had three horns and a beak that resembled that of a parrot. Some puzzle pieces are cut along the contours of the image, and some pieces are shaped like dinosaurs.