I have this technique. Fine, scare tactic, whatever. It works like a charm.
I say to the children, "Either go upstairs and play, or help me clean up down here!"
Unfortunately, my downstairs never gets cleaned up by them. But usually my objective is to get them to go upstairs and use their imaginations and quit rotting in front of the television. And it works!
It also works for "I'm bored!" Quite nicely, in fact.