Nanny Needed For My Children - Full-time / Part-time

I am a cyclist with 3 kids. I mainly need someone to watch the kids on Saturday mornings until about noon while I train. There will be about one weekend a month where I need overnight care for races from Friday thru Sunday and a couple nights a month in the evenings. I will have a set schedule by the beginning of each month so there won’t be any last minute surprises.