Nanny Needed

I am looking for somebody who is flexible that can pick up my children from school/ daycare and bring them home until I get home from work. This would be on an as needed basis. My oldest needs to be picked up by 5:30 p.m. at his daycare and my youngest needs to be picked up by 6 p.m. at her daycare. And some days just depending on my route at FedEx, I wont be able to get them on time. I will be willing to pay $40-$50 per day. And even if all you do is pick them up, and meet me at the house 30 minutes later I will still pay you at least $40. I am looking for someone stable who is looking to make upwards of $200 per week just for a few hours out of the week