Is it illegal for a 10 year old to play Fortnite?

Hello there, I'm curious about the legality surrounding children playing certain video games. Specifically, I'm wondering if it's illegal for a 10-year-old to play Fortnite? As a concerned parent, I want to ensure that my child is engaging in activities that are both SAFE and legal. Can you shed some light on this matter for me? I understand that there might be age restrictions in place for certain games, but I'm not entirely sure how these apply to Fortnite and similar games.