A group of kids are playing in a construction site when they discover a giant egg that has been accidentaly uncovered. To their surprise, it hatches into a dinosaur, that just happens to understand english and be able to grunt and mime his wants and desires to his new human friends. Naming him Denver, the kids do their best to hide him from the adults, have fun playing in a band, and sometimes even use pieces of Denver's magical egg shell to go back in time to the age of the dinosaurs.