"Oh, I was supposed to be seeing my son this weekend," she says, waving it off with her hand. She knows she has far less to complain about that he does. "He goes to university there," she adds, as if that explains everything.

When he complements the exhibit, it cheers her up just a little, and she turns towards him slightly in interest. "Oh, I'm pleased!" she replies, brightening as she speaks. "What did you think of the moon landing section?"