Continuity mistake: When Jason and Laura are flying the kite in one scene, there is heavy rain, thunder, and lightning and dark storm clouds shown in the sky, but on the ground showing the kids, the sun is shining on them (note the shadows).
Little House on the Prairie (1974)
1 mistake in The Talking Machine - chronological order
Laura: I wanted to clean the blackboards extra good today, to make up for being late.
Mary Ingalls Kendall: And talking in class?
Laura: I was not talking.
Mary Ingalls Kendall: You were, too.
Laura: Was not! Nellie was talking and I was answering.
Trivia: Peter Billingsley of "A Christmas Story" plays Gideon in this episode. This was his television debut at age 11.