The number of children treated for playground related brain injuries increased significantly between 2005 and 2013.
Government data shows more than 21,000 kids 14-and under suffered a head injury during this period.
More than half were between five and nine years old and 58-percent were males.
Monkey bars, playground gyms and swings were most frequently linked to these accidents.
Two thirds of the injuries occured at school or recreational sports faciliites.
Most injuries occured on weekdays in April, May and September.