One of the skills that need to be mastered by students with the rapid development of scienceand technology is the ability to integrate various disciplines. STEAM is one of the popular integrated learning implemented in school. However, research shows that students and teachers still have difficulties in accessing teaching materials in STEAM learning. This study aims to develop science learning materials with a STEAM approach and its effectivity on scientific creativity. This research is a developmental research that adopted4D Thiagarajan development model. Science electronic learningmaterials were tested on a limited basis to 40 fifth grade elementary school students. The results showed that based on expert judgment,thescience electronic learning material with the STEAM approach that were developed were valid for use in elementary school learning. The percentage of validity by media experts shows a value of 98.61% which can be interpreted as a very feasible media. The result of linguists' assessment shows 100% for validity percentage which is interpreted as very feasible. Meanwhile, thepercentage of material experts showed a value of 81.7%,interpreted as feasible. The results of the student trial showed percentage value of 81.28% which was interpreted that the teaching material developed were suitable for use.The summative evaluation was conducted to see the effectivity of the learning materials in enhancing students’ scientific creativity. The result of paired sample T test shows the value of 0,00 which can beinterpreted that there is significance differences between pre-test and post-test data. Therefore, it can be concluded that the science electronic teaching materials with the STEAM approach that were developed are suitable for use in elementary school learning and effective in enhancing scientific creativity.