Part of my job as stay-at-home dad is to pick up the kids after school. It's go to the elementary school to get the third grader, then off to middle school for the seventh grader.
Several parents make the same trip, including a family whose girl is in the same class with my boy. Yesterday, we pulled up behind them at the middle school pickup. She had her window down, so my boy put his window down.
She waved it him, and he waved it her. Smile on his face. On it went until we got to the front of the line, and it's pick up the older sibling and head home.