Also, just as I was thinking about it more - make sure they have a contract laid out for you (with all the details), and you both sign - are you able to leave whenever?!

As Cocoon stated, most Canadian families expect a tonne from Nannies! One family I worked with (3 school-aged boys) I made lunch, and kept the first floor & basement tidy (they had a cleaning lady every 2nd week), once a week made the boys dinner, helped with homework/piano practicing, did laundry for the family of 5, and played with the boys when they were home. It was a sweet ass job for $14/hour. I had 3 weeks PAID holidays, and PAID sick days. I signed with them for a year.
The second family was with 2 children (ages 2 & 3), at $14/hour, and had paid holidays (2 weeks at Christmas), and paid sick days. Signed with them until I found a f/t job (it was once a week on Fridays when I wasn't in School). I was only to entertain the children, and feed them lunch. Didn't have to do housework (minor cleaning up after the lunch & kids), or laundry!