Aerodium generated Wind tunnel will represent Latvian pavilion at EXPO 2010. The Wind tunnel external facade provides to be with Wind grinder. Its activity provides to be by atmospheric air movements and Wind tunnel turbulence. As identification symbol of Latvian pavilion provides to be Wind grinder. EXPO 2010 motto „Better city better life” includes an idea of happy people who create a happy city. Looking to the Wind tunnel exhibited at Latvian pavilion and Wind grinder placed at its facade people can remember childhood memories and happiness. Several people fill public space – the city with joy by unifying their individual positive emotions!