Toy manufacturer Tomy Co. has unveiled the world's smallest walking robot in Japan. The human-shaped Robo-Q, which is not bigger than a thumb, can kick a football, find its way out of a maze and dodge unexpected obstacles. The two-legged micro robot, which stands only 3.4 cm high, is fitted with artificial intelligence enabling it to navigate and play games. Robo-Q's ability to kick and pass a ball, with the use of a remote control, means the toy could be used to play miniature table football. The robot is available in four different colours and will be sold in Japan from next February for 21 pounds before being released in Europe.