Rogers has a box of food coloring, which he uses to color glasses of water. He puts blue coloring in one glass and yellow coloring in another. Then he mixes blue water with the yellow water to make green. Out of his kitchen drawers, Rogers gets a water wheel, which he demonstrates. All this is science. Mr. McFeely arrives, saying he can't find the video on making light bulbs. He does, however, show a picture of himself as a three-year-old boy. Rogers decides that people are born and grow, as opposed to toys and trolleys.
In the NOM, Robert Troll asks the Trolley if it was ever small. He takes the Trolley to play, leaving a tiny Trolley on the tracks. Mayor Maggie is late for her meeting with King Friday because the Trolley didn't pass by Westwood. She presents the king a picture of her at age five. Her phone rings, as Chuck Aber reports the Trolley has not been seen anywhere. Mayor Maggie summons Aber to an all-out Trolley search. She goes to talk to Dr. Bill about the problem. Lady Elaine shows Mayor Maggie a succession of tiny trolleys. Mayor Maggie decides to search in the Museum, but not before imploring the viewer to search outside for the Trolley. Robert Troll still has it, attracting Daniel's attention. Daniel invites Robert Troll and the Trolley inside the Clock. Aber walks by the Clock and calls Mayor Maggie. He dances to the Castle to find a concerned Prince Tuesday, who has found the tiny trolley on the tracks. Robert Troll picks up the tiny trolley, telling Aber the Trolley is at Daniel's Clock. King Friday says he has not seen the Trolley in the Castle. He implores Robert Troll to return the Trolley to its tracks. Before he picks it up, Daniel tells Mayor Maggie that the Trolley can do some unusual things.
Back in the television house, Rogers runs the water wheel as he cleans up. Then he shows a trolley platform made from old spools taped to a cardboard box. Outside, Mr. McFeely calls Rogers to see a lost dog called Lucky. He is going to return the dog to his owners, the Borlan family.
Songs: Won't You Be My Neighbor?, Your Smile's Your Style , Look And Listen, I'm Taking Care Of You, Good Feeling.