Sitter Job in Olympia, Washington

I am a single mother of two boys. My oldest is in Kindergarten and I need help with picking him up after he gets out of school until I get off work. School gets out at 3:02pm Monday through Friday. The first Wednesday of the month is half days and he gets out at 11:45am. I get off of work at 4:30pm. Because my son is to young to stay by himself after school. I need someone to pick him up and watch him until I get off work. School is just down the street from my home. I also work down the street from both my home and the school. I have had a friend that has been helping me with watching him, but she has a job opportunity that conflicts with the schedule. My son is very independent and can care for himself.