Researchers had conducted research and development to produce simple machines props and its usage worksheet. Simple machines props were developed aimed at trained students' science process skills. The researchers also describe the feasibility of simple machines props. The feasibility was seen from the validity of props and worksheet; practicality; the effectiveness; and student’s science processes skill. The props are tested by 34 students of class VIII SMPN 26 Banjarmasin. The research method was the ADDIE development model. The data collection techniques were through pretest-posttest, response questionnaires, and questionnaires of validation for 2 media expert and 1 learning expert. The result shows that the simple machines' props were highly valid criteria (4.225) and the worksheet had a valid criteria (3.85); the practicality of the props was considered practical based on student response with good category (benefit= 78.24, efficiency= 68.32, convenience= 73.87); The effectivity of the props was effective based on the N-gain score with high criteria (0.69); and the student’s science processes skill had good criteria. The conclusion is the simple machines props is feasible to use as media to train and improving science processes skill of junior high school's students.