When a lizard hatches from the egg Leonard finds in the park, he names it Buster and takes it all around the city, but Buster grows bigger and bigger until Leonard realizes he must devise a way to return his pet to the deepest, darkest part of the park and set him free.

"Danny is inspired by a new bicycle exhibit at the museum to learn how to ride a bike, and gets help from his best friend the dinosaur"--OCLC.