This study aims to develop a homemade solar cooker to be used in teaching and learning Thermodynamics. The research was based on the Design and Development Research (DDR) approach using the ADDIE model as an instructional design framework. The survey method was used to gather information about the solar cooker usability. The sampling technique used in this study is a simple random sampling that involved 30 respondents consisting of physics trainee teachers who had taken the Thermodynamics course. The research instrument consisted of validation and survey forms that have been validated by experts (n = 2). The data obtained through survey questionnaires were descriptively analyzed by the mean values and standard deviations (sd). Findings showed that the usability of solar cooker as a teaching aid were high i.e. the usability perception (mean = 4.57, sd = 0.349), usefulness (mean = 4.58, sd = 0.373) and user satisfaction (mean = 4.47, sd = 0.459). The study shows that the solar cooker can be used by students to learn Thermodynamics. It is hoped that the findings of this study will relate to the necessity for teachers to develop homemade products that relate the concepts and theories of Physics with real life.