Locomotive models are miniature representations of trains, designed to replicate the appearance and function of real locomotives. These models can vary in size, detail, and complexity, ranging from simple toy trains to highly detailed scale models used by hobbyists. They are often made from materials like plastic, metal, or wood and can be powered by electricity, batteries, or even steam. Many enthusiasts collect and build model train sets that include not only locomotives but also railroad cars, tracks, and scenery. Some popular scales for locomotive models include HO scale and N scale, which determine the size of the models in relation to real trains.