David, propose une garde d’enfant à Tours 37000

We are an English family who are visiting Tours on 1st and 2nd of August.
We have two girls, 10 and 12 year old, who speak reasonable French (CEFR B1) - I do not speak French.
We would like a childminder to entertain them for the two days, to take them around age-appropriate sites in Tours (e.g. zoo, swimming pool, etc.).
Our main objective is to exercise their French language skills.
You must be a native French speaker, and have reasonable ability to speak English.
You must have a car, and a driver's license.
We would pay for your expenses (e.g. tickets to parks, parking fees), and a per-day rate to be negotiated.