Looking for an english speaker babysitter

Looking for a female student whose mother tongue is English to take care of two very pleasant and polite (really) children aged 7 and 9 to pick them up from school certain days of the week and/or spend time with them on Wednesday afternoons during the school year 2017/2018 in the 7th arrondissement. Work will consist in taking them to/picking them up from school/activities in the 7th and the 15th arrondissement, helping with their English homework, and interacting with them in English only (they attend a bilingual school).  We are looking for a very responsible, reliable, punctual and enthusiastic young adult, ideally with past experience with children. Good opportunity to meet a friendly open minded French family.