part-time mother's helper/babysitting

We are looking for a Bosphorus University or ITÜ student (we live close to those campuses) who could babysit two boys, aged 3 & 5, 2-3 afternoon/evenings a week, approximately 4pm-7pm.  German, English, French speakers preferred, though we are open to learning another language!  

Responsibilities would include taking the boys to the park or playing with them at home, sometimes bathing them and getting them ready for bed, possibly some occasional cooking.