When Sofia tries to hand Dorothy the kaleidoscope, the eyepiece faces Dorothy. In the next shot, it faces Sofia. Later when the girls come into the kitchen discussing Laslo, Sofia holds the kaleidoscope at about a 45-degree angle in one shot and almost straight up and down in the next.
When Blanche sits down at the kitchen table, you can hear the sound of the whoopee cushion before she actually sits on it.