Babysitter Needed for my Children - Full-time / Part-time

We have 2 kids, ages 2 (boy) and 4 (girl). The older one has some half day summer camps. The younger one doesnt have any summer camps. We are looking for someone to watch our 2-year-old and take him to the playground, etc., and to pick up our 4-year-old from summer camp, and then watch both kids until the end of the day.