Babysitting in English once a week (Gracia)

We're looking for a native or native-like English speaker to help with our kids (ages 5 and 2.5) once a week. This would involve picking them up from school and spending a couple of hours together. We also need occasional help on weekends. We're flexible with the weekday, but the hours would be from 4:30 to 7:00.
We live in plaza Lesseps-
Thanks!