Looking for a native English speaker nanny in Barcelona

We are looking for a native English speaker, to pick up our 10 year old Nina from school at 16h25 on Tuesdays and Thursdays and 13h50 on Wednesdays (in Gran Via de les Corts Catalanes 707), to talk, play 2-3 hours with her and take her home or to her after school activity in Gracia.

Nina is a bit shy but after playing a bit becomes very friendly, already speaks a little English (although less than Spanish, French or Catalan), and she has a brother Leo who is 12 years old ????

We are looking for someone to start on 10th December till 19th Dec., and  then resume on January 7th.