Jon and Jenny love to catch butterflies. But when something else ends up in their net -- and that something turns out to be a baby dinosaur -- the real excitement begins. Now they need to hide their ever-growing pet Corythosaurus while continuing to feed it more and more of its favorite food -- broccoli! The tender and funny adventures that the two children get into while caring for their gentle dinosaur will captivate every child who's ever wanted a pet.