Over the years, as Dr. Bob Hamrin and his wife Carol raised their three children, he learned from his family and from friends and business associates, about the joys and challenges of parenting. In 1996 he founded Great Dads, a ministry to train dads to be the fathers God intended them to be. Since then he has also written the similarly titled book, Great Dads – Building Loving, Lasting Relationships with Your Kids, Cook Communications (2002).