The Google translation from Swedish says this is a sailing camp. I assume it is somewhere in the Stockholm archipeligo. All these junior sailors and not one fiberglass Opti to be seen!
Update on 4/09;
From Dinghy Forum on Sailing Anarchy .com we have this quote..........
Nils Björkman in Sweden has a whole slew of youth boats. He is a Naval Architect and runs Ungdomarnas Båtbygge (The youth boat building club).
A webpage of Nils Björkman designs.