Mister Rogers talks about the equipment attached to the aquarium. Linda Oehlschlager, a teenager, stops by to show Mister Rogers what she has learned in babysitting class.In the Neighborhood of Make-Believe, King Friday and Queen Sara ask Lady Aberlin to babysit for Prince Tuesday. King Friday offers to give Lady Aberlin a lesson on his new bass fiddle so she can play while the baby sleeps. The king and queen tell her to invite a friend for company. Lady Aberlin tells Lady Elaine that she wants Daniel at the castle tomorrow. Lady Elaine misunderstands and tells Daniel that the king and queen want him to babysit. Daniel feels he is not ready for the job. When Lady Aberlin learns of the misunderstanding, she explains to Daniel that she is the babysitter.