EMT baby-sitter needed part-time

We are a French family of 3. We just moved back to Paris after spending 4 years in Seattle. We are looking for a native English speaker to look after our 6-year-old son from 4:45 to 6:45 PM on Mondays, Tuesdays and Fridays, from 3:15 to 6:45 PM on Thursdays and from 12:30 to 6:45 PM on Wednesdays for the whole 2014/2015 school year (through June).
 He is a quiet, well-behaved boy and he speaks fluent French and English. 
The job involves picking him up at school (in the 7th arrondissement), bringing him home by subway (20-mn ride to Porte Maillot), giving him a snack, helping with his French homework, playing with him, running his bath and preparing his dinner.
 We live in a 2-bedroom apartment in the 17th arrondissement, not very far from the Champs-Elysees and the Bois de Boulogne. We can not provide accomodation. We are offering a net salary of 10 euros/hour, 16 hours/week.