US Engl speaker sitter needed Wednesdays

Hello, we are a French family with 3 kids. We moved to Madrid last January but lived in the US for many years before that. I am looking for a babysitter (Native American English speaker) to take care of my youngest (6yo) on wednesdays (1pm-4pm): school pick up, lunch and play so he can continue to speak English. We live next to the French Lycee (Conde de Orgaz). Thanks !