What does Piggy Peggy's green hat mean?

Let the children tell the difference. Piggy Peggy's animals are all fixed colors. For example, Piggy Peggy's skirt, shoes, gloves and hat are all red, George's are all blue, Pig's mother is orange and Pig's father is all green, which is also helpful for children to distinguish. Piggy Peggy is a cute but a little overbearing pig.