The day before yesterday, I went to the first EXPO in 21st century, "AI-CHIKYU-HAKU =EXPO 2005 AICHI JAPAN". I went there at 5pm, which entrance fee become half-price, so I couldn't see many pavilions but I could enjoy.
What I could see was Mitsubishi Pavilion "If the moon didn't exist?", Mammonth Lab, Japan Pavilion Nagakute, and some foreign countries exhibitions including Greece.
To my conclusion, the most interesting one was Mitsubishi. "Wakamaru" that is robot made by Mitsubishi corporation, navigated us to tell how the moon is important for the earth (such as the coming and going of the tide, rotation speed, and birth-story of the moon from the earth), and what is going on if the moon didn't exist as the title suggesting, with visual image. The screen was enlarged gradually widely, and the ceiling and floor covered with mirror appeared at last, which was marvelous view.