Part Time Nanny Needed for my Children

Looking for a nanny/mothers helper 2-3 days a week for approximately 3-4 hrs in the afternoons. I am a SAHM mom of 3. My oldest is in kindergarten and I need help at home watching my two younger kids while I pick up my oldest from school, take her to activities, or to simply play with the kids while I run errands and get dinner ready. I may occasionally ask for light housekeeping help. Example: tidy up playroom, or switch laundry. Majority of the time I will be home to help, but caretaker must be comfortable taking care of an infant. Must be OK with cats. We have one cat, she is very sociable and loves people and plays with the kids.