public void Visit(IElement element)
        {
            Kid kid = (Kid)element;

            Console.WriteLine($"Salesman: {this.Name} gave the school bag to the child {kid.KidName}");
        }
        public void Visit(IElement element)
        {
            Kid kid = (Kid)element;

            Console.WriteLine($"Doctor: {this.Name} did the health checkup  of the child: {kid.KidName}");
        }