Experienced Nanny/Sitter wanted for 4 year old and 18-month-old

We are looking for a nanny from 8am-5pm Thursdays and Fridays for our energetic four-year-old and our dangerously cute 18-month-old. I am going back to work full time and we have a sitter Monday-Wednesday and are looking for someone else to take the other two days a week. Our ideal candidate is likely a mom herself (maybe whose kids are older) and has "been there and been through that". She's loving yet firm with boundaries, knows that even the best behaved kids can throw you a curve ball and some days the wheels fall off and all you can do is go with the flow. Our family is pretty easy going. We like to laugh, and dance, we know that scraped knees, spilled milk and stained clothing are a part of life with kids. Our family is going through some transitions right now (I'm going back to work, there is an illness in the extended family and our oldest will start school in the fall) and we need someone who can help us through the ups and downs of the next few months..