When it comes to parenting, there isn't a perfectly laid-out plot or a well-written script. That's what these men found out when they attended a "casting call" for a very important role: father. As a follow up to its World Toughest Job video , which pays tribute to moms, Cardstore asked several men to audition for the role of "Dad." The men acted alongside crying babies, smart-mouth toddlers, and stubborn teens and struggled to get through the scene. That is, until the director told them to say the lines the way their dads would have said it. Suddenly, it became clear that the best parenting comes from the heart.