Part Time Babysitter Needed for my Children

I have a very flexible job and can pick up shifts most days. I can also typically adjust my start and end times to fit my schedule. Ideally we are looking for 2-3 days a week. Monday, Tuesday and Thursdays. We are a very active family. Minimal screen time. Lots of outdoor play even in winter. Trips to zoo and any activities welcome. We also have a 4-year-old son in preschool 4 days a week. On the occasional days he is off school, we would maybe need care for both. We are a Christian household.