Afternoon Babysitter/driver For 7-year-old In Woodley Park, DC

I am looking for an afternoon babysitter who can drive my 7-year-old son to gymnastics practice weekly on Thursdays and some Fridays. We live in Woodley Park in DC and his gym is in Baileys Crossroads, VA. Our babysitter would need to drive to pick him up from our neighborhood school, give him a snack in the car, and make sure he gets to practice on time. The hours would be approximately 3:45-6:45 p.m. I'm looking for someone with childcare experience who is a responsible driver with good references.