Nao, developed and manufactured by Aldebaran Robotics, a Paris-based company, can introduce its version of France to the visitors in three languages - French, English and Chinese.
Nicknamed by some visitors as "little genius," they can sing, dance and play Jazz and football, and even demonstrate the popular martial art Tai chi.
Spain built a huge animated baby robot, Miguelin, for its pavilion. The 6.5- meter-tall tot breathes, blinks, giggles, and turns its head gently from side to side, inviting curiosity.
In the Japanese Industry Pavilion, three robots climb up and down to a height of 20 meters.
Japanese engineer Tamai Hirohumi said the robots are more flexible with the special chips embedded in their joints.
"They could replace people doing dangerous work high above the ground," he said, and robots are increasingly a part of ordinary people's life. It's no longer a dream to apply these technologies in daily life," he said.
