A music-based narrative about the day The Wiggles (Simon, Emma, Lachy, and Anthony) looked after baby Dorothy the Dinosaur for a day. Babysitting a dinosaur isn't that much different from babysitting a baby and The Wiggles are up for the challenge. Filmed on a brand-new Wiggle Town set complete with a road with a crossing, a pirate ship, The Wiggles' House, a beach, a dog kennel, and a rose garden, the adventure takes in much colorful scenery. Full of songs to calm, to entertain, to sing along to, or to help tell the story. Of course, every song and action in the narrative is reinforcing the love The Wiggles have for their friends and baby Dorothy. The adventure begins with a song from Simon about where a story can take viewers, "Once Upon a Time," and then Lachy takes over, as the narrator. Simon is preparing The Wiggles' play area for the baby's visit when a phone call alerts him that Mrs. D and Baby Dorothy are on their way.