Shop for your official Disney Jr. Gigantosaurus toys, action figures & plush at ToyWiz.com! Four curious young dinosaurs named Rocky, Bill, Tiny, and Mazu go on adventures while following their herd. Rocky is the courageous one, Bill is the most timid, Tiny is the smallest yet most playful, and Mazu is the most inquisitive. The four friends look at things such as mapping the stars and searching for flowers but most importantly, they are asserting their independence and learning to do things away from the safety of the herd.