When Sophia mistakenly goes out the front door because she lost her glasses, there is almost immediately the sound of a car's screeching tires, and her shadow can still be seen through the doorway. The outside shots shows their house is a good distance from the road.
For all the references made to Sophia not being able to see without her glasses, it's pretty interesting that once she walks out the door and the car outside comes to a screeching halt to avoid hitting her, that she is able to see that it's a Buick.
When Dorothy and Blanche are in Rose's room, look at Baby. Its very obvious its just a stuffed toy pig. You can tell by the fluffy skin, the unnatural ear movement, and the covers would be moving up and down as its breathing. You can really tell its fake when Rose gets up off her bed.
Rose doesn't know that Baby is a pig until it arrives at the house, but she has a photo album with multiple pictures of her family posing with Baby the prize-winning pig.
While Blanche is begging Dorothy to keep the pig so they can have the $100,000, she says she'll give Dorothy anything. She says Dorothy can have one of her sons. She says she's had four kids, but she's never had a Mercedes. She then names three of her sons, Biff, Doug, and Skippy. But, Blanche has had six children. Her sons are Matthew, Biff, Doug, and Skippy. She has two daughters, Rebecca and Janet. Perhaps she misspoke and meant she's had four sons but has never had a Mercedes when she is offering to give Dorothy one of her sons if she can keep the Mercedes.