There are Karate classes in the Pancracias Sports Centre in Playa Arena, and also in the Ludotec in Puerto Santiago: There are lots of activities for resident children, and information can be gained from any school or Ayuntamiento. There is also football training for this age group on the playing field below the school in Playa de La Arena. Ludotec is a great place for this age group and can be found in most areas (Tamaimo, Alcala, Puerto Santiago). If your child is not attending school here, then it may be better to enquire at the sports centre for activities. Talk to other mums and dads in your area and I am sure you will soon be unindated with options.