Looking for an English-native speaker nanny

We are looking for an English-native speaker to play / take care of my three kids after school Monday-Thursday starting in September. The candidate will not be alone with the three kids, we have other support. Our objective is that the kids play and are spoken to in English at all times after school. 

The services would be rendered in the north of Madrid, close to the Bernabéu stadium. We offer a monthly pay. Please contact us for more information if interested. Thank you!