When a surprise package arrives from Miss Vera Goode with her new "Book of Manners for Children," Barney's friends question why minding their manners is so important. Barney explains that they have the perfect opportunity to be on their best behaviour because they're invited to a party! Then their polite purple pal helps his friends brush up on the rules of etiquette by bringing Mother Goose rhymes to life and taking the children on a magical trip to Alice in Wondeerland's "Mad Hatter's Tea Party." Whether it's sneezing, sharing, cleaning up or using good table manners, Barney helps them discover that using their best manners is fun!