Good learning devices greatly assist teachers in conveying the process of seeking knowledge to students. This study aimed to develop a STEAM-C (Science, Technology, Engineering, Art, Mathematics and Culture) integrated learning device in Masjid Kuno Taman, Indonesia to improve students' creative thinking skills. The learning devices included lesson plans, modules, and student worksheets. This research and development (R&D) used the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation). Subjects (n = 84) were selected by the cluster sampling method. The data collection techniques were focus group discussion (FGD), observation, tests, and questionnaires. The trial of using the product was carried out on mathematics teachers and students at SMP 10 Madiun and SMP 12 Madiun for the academic year 2021/2022, with a total of three teachers and 84 students. The results showed that the degree of validity of the learning devices was in the good category, as was the level of practicality seen in the presentation, use, time and readability. Furthermore, as seen from the four indicators, the devices developed effectively improve students' creative thinking skills, namely fluency in the high category and flexibility, elaboration, and originality in the medium category. As a result, the STEAM-C integrated learning device is recommended for use in mathematics learning to help students improve their creative thinking skills. Implications have been drawn, based on this research and other recent research in this area, for specific 'learning designs' in specific social contexts.