National Parent Helpline Act - Amends the Child Abuse Prevention and Treatment Act to authorize the Secretary of Health and Human Services (HHS) to award a grant to one or more nonprofit entities to: (1) provide for the establishment and ongoing operation of a national, toll-free telephone parent helpline to give information and assistance to parents to prevent child abuse and strengthen families; and (2) create an Internet website with vital information and resources for parents and caregivers to address a broad spectrum of family issues related to emotional, social, behavioral, and educational well-being of parents and children.