"Failure" is a major buzzword in parenting today: In order to raise successful, resilient kids, we need to let them fail. If your kid forgets his homework or his sports uniform at home, don't bring it to him. If she's struggling with building a block tower or, later on, an essay, or even later on (heaven forbid), getting to her first job on time, don't step in. Only by struggling, and sometimes failing, do kids learn exactly what they must do to succeed.