My project failed. My little friends started to grow after a long time, but slowly. One day they were like in this photo: http://www.flickr.com/photos/pjhaas/6835494495/
But during the night the big mushroom opened its hood, I cut it quickly, but the spores spoilt the rest. They just crumbled away. What was left I put in my garden, outside. Who knows they will grow next autumn.