In this study, 3D design products of pre-service science teachers were evaluated, and the opinions of the candidates regarding the 3D design process and the design products they created were investigated. This study is a case study of qualitative research designs. The research was carried out with 48 pre-service science teachers studying as sophomores at the education faculty of a university in Turkey. The research was carried out in the course named General Biology Practices II in 7 weeks as three classes per week. As data collection tools in the research, a interview form was used to obtain the opinions of pre-service teachers and rubrics prepared in line with the criteria that should be found in 3D designs and the design process. As a result of the research, it was found that pre-service teachers had a sufficient performance, and created good designs while establishing 3D design products. Candidates gave a positive opinion regarding the 3D design process. In particular, they stated that the implementation process helped the improvement of 3D thinking ability, thereby gaining different perspectives. They also stated that 3D design products created could be used as teaching materials.