Childcare Needed

We are looking for a great mother's helper for 3 children in Roseville. We would prefer a mother's helper who does not smoke and who is CPR certified. I mostly need help with my 18-month-old for a few hours a day, a couple days of the week, while I care for my newborn. My 6-year-old will also be present but she is pretty independent. I will need help Monday, Thursday and maybe alternating day Tuesday, Wednesday. Due to my husband's temporary schedule.