Our 3 children are 1 girl, 1 year old and 2 boys, 7 and 11. They are all well behaved and wonderful kids. Their mother and I both work so we're needing a full time babysitter.
Watch the kids, feed them, make sure they're safe. The sitter will have to get the 7 year old off the bus. Usually just watching the toddler for most of the day since the boys are at school until 3pm and 340pm. However if they're ill or have school off then they would be home too.
Were I'm a townhouse complex with an upstairs and downatairs. I work early until late usually, and my girlfriend will have the boys all ready for school and on the bus.