Dd9 has known for years that long vowels generally say their name and that they are indicated by a horizontal line over the vowel. She couldn't resist getting involved as I was teaching dd4 a reading lesson today, butting in and telling her what the long sound of a certain vowel was. Just as I thought that we'd moved on and that dd9 was back to doing her own schoolwork, dd9 stood up, held her pen horizontally over her head, and said her name over and over again. She was being a long vowel. She laughed at her own joke till her face turned red.
I admit I inflict some painfully puerile jokes on my children, and I suspect that what I make go around is going to be coming around for a long time to come.