summer babysitter for 9 year old

We are looking for a responsible, patient, and calming babysitter for our 9 year old son this summer, from June 15 to August 21, on Mondays, Wednesdays, and Fridays from 8:30am-4:30 pm. The position includes driving him to tutoring and playdates, as well as keeping him active with fun outings. Our family has memberships to several museums, the zoo, and other local attractions to make planning easy. He is a wonderful kid who is also quite anxious, so we’re hoping to find someone with a gentle, reassuring presence. $20 per hour. We require reliable transportation to and from our house but we have a car you can use to drive him around.