Things Oskar knows about
"I don't know why, but as I was working, I couldn't stop thinking about that day Mom and I went to the storage facility in New Jersey. I kept going back to it, like a salmon, which I know about."
I think its weird how Oscars Grandma lies about her eyes getting worse, just so his grandpa would spend more time with her. If she really loves him then why would she lie to him? Usually you tell someone the truth if you love them, even if its not what they want to hear.