Babysitter - Now Hiring

I am looking for someone to work 10 hours a week in afternoons to help with my children. You would only be with one child at a time as I also have a full time nanny. The primary responsibility is to pick up one of my children from school, take them to their after school activity and bring them home or play with them at my apartment. The school location is either the UWS or UES of Manhattan and all activities will be in that general area. Someone who is flexible with their schedule is ideal!