S1·E30 Turning the Neighborhood of Make-Believe upside down

Title number 0030. Opens with Mister Rogers arriving with a violin and a viola in cases. After Mr. Rogers demonstrates the use of violins and violas, he invites Michael Grebanier to play his cello. In the Neighborhood of Make-Believe, Lady Elaine has a new boomerang trick that is turning everything upside down.