David Beckham admits he is a strict father.

The 39-year-old retired soccer star - who has sons Brooklyn, 15, Romeo, 11, and Cruz, nine, and three-year-old daughter Harper with wife Victoria Beckham - only lets their sons play video games for one hour a day, as he prefers them to play outside.

Asked if his children play sports-themed video games, he told PEOPLE.com at the inaugural Nickelodeon Kids' Choice Sports Awards in Los Angeles last night (17.07.14): ''We put a time limit on it. You have to. No more than an hour. I know that sounds pretty harsh, but I want my boys to be outside playing.''

He added: ''It's so important to me that they're involved in sports -- for discipline and health. [Brooklyn] is pretty skilful. My middle one, Romeo, is the quick one; he's super fast. The small one, [Cruz], is the tough one, of course -- being the smallest boy.''

But David says his daughter is more interested in watching movies.

He said: ''She just had her third birthday party and it was 'Frozen'-themed. My little girl is the biggest 'Frozen' fan ever.''