When Steve, Robbie, and Chip are in the kitchen, Robbie pours himself a glass of milk. As he pours, a lump falls out of the pitcher and into his glass.
The song being played in the living room is Burns and Allen's "The Love Nest".
The title is from the musical 'Fiddler on the Roof' by Jerry Bock and Sheldon Harnick set in Tsarist Russia in 1905.