School pick up/care 1 day a week

Hi, I'm looking for a part time nanny to do the school pick and afternoon care of my two kids until I finish work. This would initially be for 1 afternoon a week, with the possibility to increase after a month or so.

I have a 9 year old daughter and 6 year old son. You would pick them up from school at 3.15 and then either bring them home or take them to a class or activity. If time permits on the day, it'd be great if you could get dinner started. I'd be home by 6pm. Both kids are very easygoing and happy to entertain themselves, and they don't have any soecial needs or dietary requirements.