Child trailers are specialized attachments designed to be pulled behind bicycles, allowing parents to transport their children safely while riding. These trailers typically feature a sturdy frame, weather-resistant cover, and safety harnesses to secure the child. They come in various sizes, accommodating one or two children, and often include storage space for snacks or gear. Many child trailers are equipped with features like adjustable seats, suspension systems for a smoother ride, and reflective materials for visibility. They can also be converted for use as strollers or joggers, making them versatile for different outdoor activities. Popular brands include Burley and Thule.