Mecha is a science fiction genre, that centres around robots or machines. These machines vary greatly in size, shape and appearance. Some are little more than cars with arms and legs, while others are giant humanoid constructs. Difference sub-genres exist, with varying connotations of realism. Super Robot and Real Robot are two such examples found in Japanese anime.
Read more about Mecha: Characteristics, Early History, LEGO Uses, Real Walking Vehicles