The Chicago Pre-College Science and Engineering Program provides hands-on science and engineering activities for children and their parents in Chicago. Focused on families from underserved communities, Chi S&E’s model is unique in that: 1) programming begins with young elementary students and builds as they grow older; and 2) parents/caregivers of young children participate in the programming with their children; 3) emphasis is placed on teaching mathematical competence as this is essential for successfully pursuing post-secondary STEM education.