Sit on a can?

Brent and I have really been working with Elli on staying in her seat during meals. She tends to want to run around, pick up toys, etc. So, Elli was up and Brent was telling her he was done warning her about staying in her seat. So, he said, "Get back over there and sit on your can." Elli replied very seriously, "Sit on a can? I want to sit on my seat!" I began laughing, silently, but violently:) I started crying I was laughing so hard. Eventually we all ended up laughing, but I think Brent still got his point across. I asked Elli a couple nights ago to please throw away her sticky napkin and she said, "Remember, daddy wants me to stay in my seat?" Goodness!