Searching for an English teacher

Hi. I'm searching for someone who talks to my sons in English in summer. The timetable would be from 10.00 a.m to 15.00 p.m., everyday from June 27th to July 15th (except weekends). They are seven and three years old. It's only for fun,  to speak in English in order to feel more confident of their English. We are thinking of paying 450 euros in  total (150 euros per week). Thank you