Now that Jessica gets marbles (which lead to money) for certain household chores, she's much more amenable when I ask her to do one of those chores. I usually call out "I have a marble-earning opportunity!" and see which child bites.
But even though that's the phrase I use, it was odd to hear Jessica ask, in a very businesslike tone, "Do you have a marble-earning opportunity available?" She was one marble away from earning $5 so she was very motivated.