Looks like the game of jackstraws at first glance...
Balder is a wooden roller coaster at the Liseberg amusement park in Gothenburg, Sweden.
It opened in 2003 and was an instant success. Balder has twice, 2003 and 2005, been voted Best Wooden Tracked Roller Coaster in the world in a major international poll - not because it is the biggest or fastest roller coaster, but because of the high percentage of "air time" during the ride.
Balder is very different from a traditional wooden roller coaster because it is a prefabricated wooden roller coaster.
This means that instead of trackers cutting, shaping, and laying down the track on site by hand, the track is laser cut in a factory. This means that the track is manufactured to a higher degree of precision than could ever be achieved by hand. The track is also made so that it snaps together like Lego pieces. The track also is made of more layers of wood that are tightly bonded together instead of nailed together by hand like a traditional wooden roller coaster. This has three major benefits, two being to the park and the other being to the riders.