The World's Premiere Children's Entertainers will Celebrate Their 20th Birthday In The United States And Canada This Summer! The Fab Four from down under are back with this year's most anticipated family event. It's time for a party. The Wiggles Big Birthday party! Join The Wiggles, Captain Feathersword, Dorothy the Dinosaur, Henry the Octopus, Wags the Dog and all the Wiggly Dancers as they celebrate their Big Birthday in your hometown!