This brief introduces the Building Bridges and Bonds study (B3) to practitioners and stakeholders in the fatherhood field. It describes three innovative practices for Responsible Fatherhood programs. Each innovation is practical and interactive and addresses issues important to low-income fathers. The B3 team selected them for their high potential to provide useful lessons for the field. The team then collaborated with local fatherhood programs and program developers to tailor the innovations for B3. The brief is the first in a series of publications on B3, its findings, and the lessons learned.