The painting is indicative of the increasing role of the young in the Collective's manifestations. It was the work of six or so ("maybe some more in the end") young people between 9 and 17 years old. 

A Tetterode adult told me: 

"They made the paintings in 2006 for the party and exhibition that was organised for the celebration of the 25th birthday of Tetterode. There were no adults involved, in fact, as we were setting up the exhibition, we had to use, of course, the elevator for bringing materials down into the gallery-space (which was used to show a huge maquette of our building). The children were presumed to start with their painting two or three weeks before the opening of that exhibition, but three days before the opening they were only half way. So they occupied the elevator during those last three days and we, as adults, could not use it anymore and we had (all of us) to use the stairs instead. 

The children were in the elevator those last three days, accompanied by lamps and music, until late at night. I guess that there were some nights in which they did not come home at all. It was a funny situation: we could hear the music and we saw some movements behind the round windows of the elevator, while we as adults were all busy with heavy pieces of wood and other materials, dragging them down the staircase."