Selecting and trusting someone to babysit your kids is an area fraught with difficult choices. You are leaving your most precious people in someone else's hands. How did you find a babysitter that you were happy with?
I don't have kids, but if I did, I would probably ask a friend if they have a babysitter they trust. If they don't, then I would go to an agency that hires nannies and has a lot of credibility. Even then, I wouldn't just leave a stranger with my child straight off. I would want us all to spend several days out together, to observe the person I am hiring, to make sure I trust them and that my child gets on well with them.