Children who behave in an ungrateful manner typically lack the maturity to solve problems or vent their displeasure in unhealthy ways. Here are strategies for you as a parent to handle this stage of your child's development, even though it may test your patience.Children who behave in an ungrateful manner typically lack the maturity to solve problems or vent their displeasure in unhealthy ways. Here are strategies for you as a parent to handle this stage of your child's development, even though it may test your patience.