Mister Rogers' Neighborhood (1968)

S1E28 Things that fit into other things

In episode 0028, Mister Rogers makes a charming entrance with an assortment of nesting boxes. Meanwhile, an unexpected package arrives at the television house. After securing his pillow in a safe, Edgar Cooke shares his mixed emotions about the situation. Lady Elaine Fairchilde discovers her beloved toy, a boomerang, bringing a sense of joy to the day.