Picking up at the school and speak english

Hello, my name is Paula. I am the mother of two children at El Recuerdo school (Chamartin area), a 4-year-old girl who is in second year of preschool, and a 3-year-old boy in first year of preschool.I am interested in hiring someone to pick up the children 2 or 3 days a week (they finish at 4:45 pm, except on Wednesdays when they finish at 3:45 pm) and spend 2 or 3 hours with them playing and speaking to them in English the entire time. The idea would be to pick them up at school and bring them home by bus (we live about 10 minutes away by direct bus line). If you're interested, we can have a call to discuss further.