public List <ChildDTO> GetAllChildren()
        {
            IEnumerable <Child> children    = childRepo.FindAll();
            List <ChildDTO>     childrenDTO = new List <ChildDTO>();

            foreach (Child child in children)
            {
                childrenDTO.Add(new ChildDTO(child.Name, child.Age, entriesRepo.FindChallengeNumber(child.Id)));
            }
            return(childrenDTO);
        }