How do I babysit 7 year old and 10 year old siblings?

I have never babysat before, but my neighbors asked me to babysit their kids tonight. The kids are both boys. I know the parents well, but not so much with the kids.

I don’t know what to do with the kids. How do I talk to them? Will I be expected to make dinner? I pretty much need help with what to do during the night…im worried its going to be awkward… and will the 7 year old already have known how to take a bath by himself?