When Callie May first shows John Walton the set of blueprints they are rolled up. The next morning the blueprints are folded flat.
When Cindy and Elizabeth are talking to Ike and Corabeth at the store counter, the ends of Cindy's hair are dyed pink. This is most apparent in the final shot of the scene.
When everyone is decorating the new Home Front Canteen, mention is made that they found some things at the Baldwin's Antique Shop. No such shop has been shown previously. That info could have made a show in itself.