Toyota has unveiled a humanoid robot that walks, waves its arms and bows. And, as if that were not enough, it also plays the trumpet.

The four-foot-tall robot, introduced last week, is a prototype for what Toyota says will be a series of autonomous machines that it hopes to build over the next two decades to serve as personal assistants, aides for the elderly and laborers. Toyota also displayed a rolling robot and showed film of a pair of robotic legs that its engineers designed to carry a disabled person.

Toyota is the second Japanese car company to build a humanoid robot. Honda introduced its first walking robot in 1996. Its latest version, called Asimo, can dance, recognize familiar faces and answer simple questions. Sony also unveiled a small humanoid robot last year.

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