Babysitter Needed for my Children

I am a part time teacher, and our schedule is a block schedule i. e. A-day's and B-day's. I teach on A days. So we need thursdays every other week and fridays every other week. It's only 1x per week that we typically need child care from 11:30-4:00 p.m. on either thursday or friday depending on whether or not it's an A day. We have a 20-month-old toddler boy who is very active. He loves playing outside. We live very close to the park and library. We also have a bernese mountain dog that someone needs to be comfortable with. He will nap for 2 of the 4. 5 hours. During those hours, we'd love some light house work or meal prep done.