In the present study, the effects of STEM-based robotics applications on students' creativity and scientific attitudes in the Electricity Unit of 7th grade have been investigated using the mixed method's nested pattern. Sixty students, 30 of whom are the experimental group and the other 30 constitute the control group, attending a post-school course in Istanbul in the 2018-2019 academic year, participated in two weeks of pre-applications and four weeks of applications. TOSRA measured attitude towards science, and the "Torrance Creative Thinking Test" to measure creativity was applied as pre and post-test. The data gained from the tests were analyzed with SPSS 21. In addition, semi-structured interviews' data were analyzed by using content analysis. As a result, it was observed that STEM-based robotics applications significantly increased students' creativity and attitudes towards science. Interview findings show that students enjoy using STEM applications that contain applications instead of theoretical knowledge. Using robotic and complex software materials to solve daily life problems, they felt like scientists during the practices, and the applications affected their future career choices.