Research on the effectiveness of STEM-focused (science, technology, engineering, and mathematics-focused) schools and other learning experiences (e.g., short-term camps) on student outcomes is sparse. This study documented perceptions of STEM content and careers for elementary, middle, and secondary school students participating in university-based summer camps focused on robotics. Attitudes before and after the camp experiences were compared across gender groups and grade levels. Middle school students showed greater growth on the surveys compared to their elementary and secondary school peers. Implications for the design and evaluation of STEM experiences include looking at longer, more intensive experiences.