Mister Rogers' Neighborhood (1968)

Season 13: Episode 4

Mister Rogers arrives with a fife which he has borrowed from Joe Negri. Expressing how difficult it is to play the fife, Mister Rogers takes viewers to the kitchen where he has a row of bottles set up. Using these bottles, filled with various amounts of water, Mister Rogers is able to play Tree Tree Tree. Joe Negri stops by to pick up his fife and invites Mister Roges to join him on a visit to Betty Aberlin's Little Theater. At the theater, a group of musicians demonstrates the fife and plays it along with their drums.