Bilingual Schools for English speaking 3 and 6 year old

Hi, we are moving to Paris from South Africa later this year for at least 5 years.  Our family speaks only English but we are wanting to enroll our kids in a bilingual school as they are 3 and 6 years old and should pick up French pretty quickly. I will be working in Issy-les-Moulineaux. Unfortunately my employer will not be providing support for school fees so the British or Paris international schools are not an option due to costs.I would be very appreciative of recommendations for good bilingual schools in Paris for my kids.Stay safeNerissa