Every kid has them, and every parent, or kid-caretaker, has had to deal with them - those meltdown-tantrum-pitching-a-fit moments! Peter Panda has them - when it's time to leave the playground, when some other child has the book he wants, when Mama insists he eat some broccoli. When this happens: Uh-oh. Here it comes. Here comes that frown. Peter Panda melts dowwwnnn! Presented with humor and u…