Larger SEPA projects are usually realized in the course of one- or two-week experimental camps. So far, three such events have been organized. The first one took place in 2001 in Sąsieczno, near Toruń. Among others, an attempt was made then to reconstruct Late Paleolithic sunken houses. During this experiment used were only flint, bone and antler tools. The only techniques employed were those available in the Stone Age. In 2002 further work was carried out with the sunken houses, the basic aim of which was an attempt to reconstruct a part of outbuildings, accompanying residential buildings at the primeval times. Using the replicas of Stone Age tools, a covered resource cave and smokehouses were built then. Area developed in this way was left without care, observing the slow process of its degradation. Next camp took place in 2004 at the Ethnographic Museum in Kaszczorek. During its course conducted was a number of experiments, the results of which were partly published. Among them mentioned should be experiments aiming at reconstruction of: methods of hole drilling in stone axes, techniques of production of tar with non-ceramic method, as well as experiments using obsidian and bone tools for working on various materials. Members of the Society have also organized several shorter (a few days) events of the described type.