They are using filters and effects for the colors, but it is still great stuff.
I have been to Wilson Park as a teenager. Poznan, Poland hosted one of the worlds largest industrial and technical trade shows in the world. My father took me along on his eastern European trip that summer.
Here is a photo gallery of the Park itself in which a lot of the fun activities for the trade show were located.
http://www.cs.put.poznan.pl/poznan/gall11.html