Glasses

John told me tonight, "When I grow up, I'm going to still wear glasses. I'm not going to get contacts. But on my second pair I'm going to make guards that would flap down and cover my glasses. I would still be able to see, but the guard would block the smoke. You know when I'm building stuff." Gillian said "Or you could just take the working glasses in my room." John looked at her like she was crazy. She said "I have glasses in my room that you could put over your glasses and they would stop stuff from flying at you." John said "Gill, my invention is for smoke!"

I love that he has created a solution to a problem he hasn't experienced yet. And that Gillian solved it with simple logic.