In 2005, she started running Teatr 21, which features actors with Down syndrome and autism. It is the only theatre of this kind in Poland, performing not only on Polish, but also on international stages. They have appeared in, among others, Powszechny Theatre in Warsaw, POLIN Museum of the History of Polish Jews, and Zbigniew Raszewski Theatre Institute, which is also the theatre’s headquarters. The group has also performed at the Brave Festival in Wrocław, Malta in Poznań, All About Freedom in Gdańsk, as well as Normal Festival in Prague, Menteatral in Neratov, and No Limits in Berlin.
She stresses that from the very start she has aimed at leading a professional theatre group, rather than theatre therapy. She explains the process of preparing performances on teatralny.pl:
Each adventure is different. The constant factor in each play is the fact that we don’t work off a script. We only used one in the case of the two shows for children, but they still included a lot of things that didn’t exist in the text. The rest of shows are simply improvisations, based on searching, and, of course, getting lost. But we always get lost together, as a team, together with the dramaturgist, the choreographer, the musician, the scenographer, the video maker, and so on. […] Three quarters of our work is work in progress, only a small fragment of which is eventually extracted. Sometimes I wonder if we could cheat somehow, whether our actions aren’t pointless, because all those explorations are very uneconomic. Sometimes I am under the impression that we have walked the entire Alps, and we suddenly find something and begin to wonder if we could have gotten there straight away.
In 2016, Justyna Sobczyk received the Kamyk – the Konstanty Puzyna Prize, for her theatre and educational activities, which combine art and life, and marry unique creativity with social engagement.