Mac is a giant blue dinosaur (Tyrannosaurus) with a huge round belly that loves to eat buildings and entire cities. Usually swallows buildings whole. He likes to drink various drinks from trucks. 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.