Auxiliar conversación nativo para hablar en inglés

I´m looking for a native English speaker for Mondays and Wednesdays afternoon. The job consists of talking and playing with two kids who are 8 and 11 years old. Only when they have English exams or homework, it´ll be about to help the children to do them, before starting playing. Timetable: on Mondays from 5 to 7:30 p.m. and on Wednesdays from 5 :30 to 7:30 p.m. We live in Atocha-Delicias area, lines 1 and 3 of subway.