Cheap labor
Somebody once said, “Money is a powerful motivator,” and indeed it is. You can make anyone do some ridiculously insane or mundane task even if you offer them an appropriate amount of money for the job. Even your children! Rather than spending $100 to hire a babysitter, ask your child to ‘self-sit’ and offer them $30.
It’s amazing, and once you start this, there’s probably no going back to the conventional (and comparatively costlier) babysitting way. Not only do you save quite a large chunk of money, but you also teach your children to be responsible. Win-Win for all!