Babysitter Needed for my Children - Full-time / Part-time

We are looking for a great babysitter for 3 children in Portland. We would prefer a babysitter who has their own car, who does not smoke and who is CPR certified. I am a nurse and have a variable work schedule. I will be able to identify my work days a month or two ahead of time but hope to work one Tuesday or Thursday a week. These hours would be 1-5 p.m. when my youngest is off preschool and my older kids will join around 3 after they are out of school. Job duties will Include getting them settled after school, light dinner prep. My kids are very comfortable with sitters. We appreciate sitters that will take them outside when nice and do fun activities not including a screen!