What does Grandma say when Mrs. Weidenbach suggests that the children might like a day at the fair?

From the text:

Growing frantic, Mrs. Weidenbach let her gaze skim over Mary Alice and me. “And a day at the fair would be a nice outing for your grandkiddies.”

"Wouldn’t cut any ice with them," Grandma said. “They’re from Chicago, so they’ve seen everything.”