Centered around principles of universal design, designing for accessibility, and engineering with empathy, the Build a Better Book Teen Internship program examines how teen interns’ perceptions of engineering and self-identities as engineers are formed and cultivated as they design and create more accessible products for authentic community clients who are blind or have low vision. Many teens have a limited understanding of what engineering is and what engineers do, and often their perceptions do not align with their interests and strengths. This project aims to impact teens’ perceptions of engineering, their engineering identities, and their confidence and competence in engineering and 21st century workplace skills. Using a design-based research approach, the internship model is being tested at four sites around the country, including a school, public library, university, and science museum. Data collected from each site include pre-/post-surveys and audio/video reflections, interviews with site leaders, a culminating focus group discussion, and artifacts created through the program (i.e., products designed for community clients). Early findings suggest positive changes across sites, including broader perceptions of engineering and shifts in engineering identity, increased confidence and competency in technical skills, and gains related to 21st century workplace skills, such as communication and collaboration.