Part-Time Sitter/Nanny

I am looking for a Part-Time Sitter/Nanny. I have 2 boys, one will be 2 in July and the other will be 1 in September. I'm looking for about 7 hours a day three to four days a week permanently and then would also like to be able to call on you for other babysitting as needed. I'm looking for someone that will play with the kids, take them for walks, to the park, light housekeeping - basically just cleaning up after the kids and do their laundry.