PT nanny/babysitter for 6 y.o boy and 3 y.o girl

Hello, I live in Belmont. We are right on the bus line. I have two kids. For 2 days of the week, I need someone to pick them up from school around 4:30 bring them back home, give them a snack and bath. Total hours will be about 4-6 hours a week. Days commonly needed are Monday, Tuesday or Wednesday. I will know 3 weeks ahead about which days I will need you. Thanks, Yamini