Research shows student participation in science programming can affect scientific interest, academic performance, college majors, and careers. This article reports a study where results obtained from questionnaires completed by participants, parents, and guardians assessed whether interest in STEM disciplines was advanced by a summer day-camp attended by elementary and middle school students. Participants indicated that most activities positively affected their interest in STEM subjects. Parents and guardians also reported that student subject-matter interest was noticeably enhanced following the camp. Results indicate that inquiry-based but non-mathematical STEM activities were most successful at stimulating interest.