A small domestic appliance is a portable or semi-portable machine, generally used on table-tops, counter-tops or other platforms, to accomplish a household task. Examples include microwave ovens, kettles, toasters, humidifiers, food processors and coffeemakers. They contrast with major appliances, such as the refrigerators and washing machines, which cannot be easily moved and are generally placed on the floor. Small appliances also contrast with consumer electronics which are for leisure and entertainment rather than purely practical tasks. Small appliances are often mechanically simple devices, typically built around a single heating element, fan, set of blades or similar mechanism with only a few mechanical linkages, which generally makes them straightforward to repair.