Mac is a big blue dinosaur (Tyrannosaurus) with a big round belly who loves to eat muffins. He also likes to eat other food, stuff and preys which he usually swallows whole. He is kind, sweet and likes to cuddle. He likes to eat and be fat. He has many friends. His best friend is the green kangaroo Duncan, who can change his size so he can be as big as or bigger than Mac. Often Duncan treats Mac as his pet and walks him on a leash, but Mac likes it.