Native English Teacher for a Kid in Alcalá de Henares

We are looking for a native English person (babysitter, teacher, University student)for our 3-year-old son who could teach him English in a natural way, by playing, singing etc from September on (On Friday afternoons and, if possible, on Saturday mornings, as well). As it is a long-term project, we would like to find someone who could teach him at least for an academic course. We live in Alcalá de Henares.  For further information, please, contact us via email. Thank you.