Hello friends, in this video I show you how to make an Oxygen cycle and Carbon dioxide (carbon) cycle working model at home using simple, affordable materials. I build the complete project on a cardboard base and create a neat, school-ready layout using tissue paper, acrylic colors, and white glue. I also use an artificial plant, GI wire, and red tape to make the arrows and flow paths clear, so you can explain the cycles properly during your school or college project. While making the model, I also explain what the carbon and oxygen cycles mean in an easy way. For the carbon cycle, I focus on how carbon dioxide is fixed by plants through photosynthesis, how carbohydrates are formed, and how carbon returns back to the atmosphere through respiration and decomposition. For the oxygen cycle, I show the idea that oxygen is a by-product of photosynthesis and is used in oxidation/respiration processes. If you follow my steps carefully, you can make this model easily, and it becomes a very helpful diagram-style 3D project for exams, exhibitions, and science fairs.