Hi My 2 Girls,
I am a Certified Professional Nanny, and I've helped parents interview nannies in the past. I like to ask the following:
1) Tell me about a stressful situation and how you handled it
2) What would a typical day with my kids be like?
3) Why do you want to work with kids? If they answer that they just love kids, they are so cute, don't hire them. We all know kids are cute, a handful and can stress you out. This isn't play time, it's work time.
4) What do you do in your off time? This person will have a lot of time with your children and you want to make sure their morals are inline with yours.
5) Provide the babysitter a real situation that you had trouble with and see how she'd handle it.
I hope these help. Do a background check & see if you can look her up on line. You don't want a party girl watching your kids, especially after drinking all night. This is from experience. I had a family who got a 2 am call from the Nanny on accident. She was out partying when she was scheduled to work that morning!!!!
Good Luck
R. Magby