How much are you looking to make? I’ve worked retail in the past in this area and the jobs that you may think are minimum wage typically aren’t, especially if you have any experience. (As an example, I made $13/hour at my last retail job.) Most retail jobs will pay $10-$15/hour-still not a large sum, but more than minimum wage.
I have several friends who have found siiters through sittercity.com, so that might be an option if you are looking to babysit.