Looking For Full-time Nanny

I work from home full time and we are in need of a nanny to be with my four children while I'm working during the day. I have two boys (2, 8), and 2 girls (6, 11). They are homeschooled, so they are here the whole time during the day. The 11-year-old is pretty self-directed, but the others do need some help with lesson completion in the mornings, and I do some subjects with them in the evenings. Ideally I'd like someone who would like to provide some structured activities for them around art projects or learning about other countries. Aside from school, they do a lot of free play, art, lego-playing, fort building, etc. My kids are pretty precocious. They do really well with people who are interested in play, but who can also hold firm boundaries and help enforce rules kindly, but fairly.