To promote knowledge and interest within historically marginalized racial and gender groups, a three-and-a-half-week summer camp centered on computer science (CS) was developed using a culturally relevant pedagogical framework. This program encompassed hands-on instruction utilizing MIT App Inventor, collaborative projects in mobile app design, and mentorship sessions. A cohort of 42 minority students, predominantly Black students, received tailored guidance based on dynamic assessment-informed scaffolding. The analysis of surveys, individual interviews, classroom observations, and artifacts revealed a positive impact of the program. Participants not only exhibited increased confidence in block-based coding but also displayed heightened interest in STEM careers and a broader understanding of the CS field. Despite these positive outcomes, the influence on CS career aspirations appeared to be limited. Although the program helped participants explore various CS career options, their initial career aspirations remained unchanged, indicating the need for an extended period to observe lasting effects.