Nanny Needed For My Children - Full-time / Part-time

We are looking for a part-time afternoon nanny for my two young girls, 4. 5 and 2. Nany role includes picking up the 2-year-old from school, putting her down for a nap, light house-keeping, picking up the older girl from school and driving her to an activity. We want a non-smoker, someone trustworthy, positive, and warm. We had a full time nanny who we loved, but now only require 25 - 30 hours a week.