Babysitter Needed - Full-time / Part-time

We are looking for someone to help us in the after school time slot with our one and 3-year-old daughters in Bethesda. We would prefer someone who can come a few nights a week but it does not have to be every weeknight. The caregiver would need to be able to prepare dinner (no real cooking required), give baths, and do bedtime. We prefer someone who is energetic and engaging for young children. In the past, graduate students have helped us and been great fits. No driving on the job is required. We live near bus stops but no metro.