Recent lines from my kids:

"Mom, I'm not being pointlessly cruel to my sisters! It's a scientific experiment."

"It's too bad that there's only one [sister]. Because if there were more than one, I could destroy a few of them, and we'd still have one left."

"NOBODY CAN BE HERE BUT ME!! Oh, and Eitan. People under age three don't count as people."

Ahh, sisterly love.