His went to his grandfather’s for a short visit. His grandfather will work on projects around the house and he’ll watch while they chat. Today’s project is lawnmower repair, so his job will be getting the tool from the toolbox to his grandfather’s hand and then returning it to the box. His grandfather has a special talent for engaging whatever the current topic of perseveration is while I change the subject or ask stupid questions. “Do you think their armor smelled like sweat and urine?”
When he was younger and obsessed with all things space, I tried to learn new things to add to the endless chatter about a single topic. He always knew it already.