Sorry if this info has already been posted, although I could not find it.
Fraport organizes two trips FRA-TLS-FRA to visit the A380 assembly line (and local surroundings).
Dates 06.01 to 08.01 and 10.02 to 12.02.
More info, in German, amy be found on Fraport web site:
under "Weitere infos zum A380 in FRA"