"Free-for-All" in Fortnite is an exciting game mode where every player competes individually. Unlike team-based modes, it's every player for themselves, with the goal being to eliminate opponents and be the last person standing. Players can find weapons, shields, and other items around the map to gain an advantage. This mode emphasizes quick reflexes, strategic thinking, and adaptability, making it a thrilling and fast-paced experience for kids who enjoy competitive gameplay.