Prototypes need to utilize the best processes possible for their parts. They need to provide strength and also stay lightweight and cost-effective. One of the processes that can help provide these characteristics is rotational molding. Rotational molding is often the molding process of choice for those who want to add plastic pieces to their prototypes. There are multiple benefits to be had by rotational molding and the process that creates these plastic pieces for a prototype. The process of rotational molding is incredibly simple and interesting. Plastic polymer powder is added to a mold, which is rotated. The mold is heated, slowly melting the polymer powder. The melted polymer sticks to the outside of the rotating mold, creating the hollow piece of plastic desired for the prototype. There are multiple benefits to be had by the rotational molding process. The major benefit comes in the form of cost savings. Rotational molding is one of the more inexpensive options for those who are looking to mold pieces for their prototypes. The cost of polymer is low, as is the cost of operating the mold itself. Another benefit comes in the form of weight. Hollow parts weigh less than solid parts, which helps to drastically lower the overall weight of the prototype, providing multiple benefits to the prototype itself. It is important for inventors to understand as much as possible about the different processes they may use. Inventors should talk to different manufacturers about the processes they provide and whether or not rotational molding is a viable option for their prototypes. If it is, this form of molding provides a cost-effective way to bring a prototype to life.