MassCONECT (Massachusetts Community Networks to Eliminate Cancer Disparities Through Education) 4 Kids: Promoting Smoke-free Homes

Inclusion Criteria: * Tobacco smoking occurs regularly (smoke a minimum of one cigarette/cigar per day or five cigarettes/cigars per week) inside the home or in an attached patio/porch, hallway or stairwell * Primary caregiver of child aged birth to 5 years old (inclusive) enrolled in Massachusetts Early Intervention program, Healthy Families program or the general population in Boston, Lawrence and Worcester areas. * Ability of a custodial parent aged 17 or older/legally authorized representative or primary caregiver of child enrolled in participating programs to give permission for the index child to provide saliva sample. * Participant has access to a telephone to schedule study contacts and participate in follow-up calls Exclusion Criteria: * Not able to understand English or Spanish at a 8th grade level or above * In poor physical or psychological health (self-reported and observed by Community Health Worker), for whom participating in this intervention study might compromise the child's or participant's welfare, or be impracticable * Index child is a ward of the state