This study aims to determine the feasibility of a guided inquiry model of physics science learning device on the topic of vibrations, waves and sound. The development of the tools was carried out based on the Tessmer development research model so as to produce a proto-type that was tested up to the field test stage. The data analysis technique is descriptive quantitative. The appropriateness of the learning device is stated from its validity, practicality, and effectiveness. The validity of learning devices can be determined from the results of validation by experts and the results of individual trials. Practicality is determined from the implementation of the lesson plan and the responses of teachers and students to learning devices. Effectiveness is determined by the ability of students in implementing worksheets, cognitive learning outcomes, teacher and student activities, social skills, character behavior, and students' psychomotor skills. The results of development research show that the learning tools are valid, practical, and effective. Based on the results of descriptive analysis, it can be concluded that the learning tools that have been developed can apply the Guided Inquiry learning model well.