Part time nanny on Mondays and Wednesdays

I am looking for someone to look after my kids on Mondays and Wednesday’s from 3-7pm during the later half of this school term. They are 14 (son) and 11 (daughter). Both need to be picked up from school (two schools, same suburb) between 3-3:30pm and taken to and picked up from extra-curricular activities. Some easy dinner prep and lunch box making would be part of the afternoon routine.