Backup Childcare for some cute kids - Full-time / Part-time

I (Annie) work part time and have two kids in school (6 and 5) and two at home (3 and 1.) I need more people on my list of backup contacts when childcare falls through. This summer all the kids will be home, and my ideal work schedule will be three 9 to 5 days a week, but even partial days are helpful when childcare falls through. Play, feeding lunch, and putting kids down for naps is the general tasks involved. Helping with math and piano is a plus. We have a yard. This is my husband's account through work and I don't get the notifications. Sorry in advance for the possible delayed response.