We are two working parents and we have three fun and energetic boys (rising K, 2nd, and 5th grade).
The boys will all ride the bus, which should drop them off at home around 2:40pm. We need someone (Mon-Fri) to pick them up from the bus stop and watch them at home until about 5pm. Giving them snack, checking if they have homework, playing with them / encouraging them to play with each other nicely, that sort of thing.
We live in American Village, near Duke University and 15-501. I marked "help with homework" but think this will be more along the lines of encouraging them to do it.

If possible, a nanny could start watching them over the summer. The older boys are in various camps over the summer (youngest still in preschool) and the pickup times are somewhat variable so it's a little bit chaotic. But, if you are interested, there could be an option to help this summer with pickups and afternoon care.