<![CDATA[The Miniature Micro Hydro Power Center (MHPC) is a development of learning media, implementation of science learning to improve critical thinking skills for elementary school students in Indonesia. The operation of the miniature MHPC resembles the real MHPC Karekan, located in the Karekan area, Banjarnegara. The purpose of the research is to produce MHPC Miniature media, test the validity of MHPC media and test the effectiveness of using MHPC in science learning to measure students' critical thinking skills. This type of research is research and development with the ADDIE (Analyze, design, develop, implementation, evaluation) model. Research methods: potential, teacher needs, student needs; 2. Product validation test by material experts (involving 1 lecturer in science content and 5 experienced teachers), technicians and 9 practitioner teachers; 3. Testing the effectiveness of the use of miniature MHPC on critical thinking skills, involving 102 students at grade 5 (sample of 3 classes from 3 schools, consisting of divided into experimental classes and control classes from 7 schools as residents in the Ki hajar Dewantara cluster, North Purwokerto District, Banyumas Regency, namely Grendeng State Elementary School 1, 2, and 3. Data from the post-test were tested for normality, homogeneity, and independent sample T-test using SPSS 2022. The results of the study: the results of the validation of science content experts, experienced teachers, technicians and 9 practitioner teachers using the Content Validity Index (CVI) gave UA product a rating of > 85 with the comment "MHPC miniature media is suitable for use in learning". The results of the normality and homogeneity test obtained significant values of 0.09 and 0.6 where sig>0.05. The Independent Sample T test showed that the use of MHPC miniature media had a significant positive effect on critical thinking ability in the experimental class compared to the control class that only used the MHPC Karekan video media (p < 0.05). The results of the development of MHPC miniature products can be used in science learning and have a positive effect on students' critical thinking skills.]]>
