Summer Part Time Babysitter

My family is looking for a summer, part time babysitter. Our children are 3 and 6.
We are hoping to find someone to watch (playing at the park) my 6-year-old daughter for a few hours during the weekday mornings. Realistically, 2-3 hours/day and maybe 2-3 times per week. We are flexible with those days, as I will be with my younger 3-year-old.

Also, would be great to use this same caregiver for sporadic date nights.