Sega took the wraps off its latest invention in Tokyo, <A HREF="http://news.zdnet.com/2100-1040_22-5543369.html?tag=zdnn.alert">a robotic canine</A> known as iDog that can be used to compose and play music. It also dances to the beat. According to the Japan Today news site, the four-legged automaton features a number of switches located on its nose and other parts of its diminutive body that are used to create and play music. It has other buttons that cause the pet to light up or express emotions. The mechanical beast also features onboard sensors that detect and react to movements when it is held in an owner's hands.