Model engineering, also referred to as miniature engineering, focuses on creating small-scale versions of machines, equipment, and structures. Some synonyms for model engineering include miniature engineering, small-scale engineering, and model making. Miniature engineering is often used to create working models of machines and other structures that are too large or complicated to produce in full scale. Small-scale engineering encompasses a vast range of projects, from model airplanes and trains to electronic devices and micro-mechanical systems. Model making, the process of developing small-scale replicas of items, offers hobbyists and professional engineers alike the ability to explore their creativity while designing, building, and modifying physical, complex objects.