Nano- and micromotors are nano- and microscale devices, respectively, designed to perform selected mechanical movements in response to specific stimuli. They are built from a few nano- and microscale components, each of which can be biologically or chemically functionalized, and operate using some type of energy input. Over the past decade, researchers have shown increased interest in nano- and micromotors. The development and application of these devices are among the most pressing challenges in current nanoscience and nanotechnology. The videos contained in the Supporting Information clearly demonstrate that nanomotors are no longer the subject of science fiction. Also included in the Supporting Information are tables that summarize the main advances in composition and operation for each class of nano- and micromotor.