  We are interested in the learning of 6 to 7 years old children in
implementations of a situation of reproduction of figure by folding presented
in the first part of this article. In the second part we expose our problem as
well as our hypothesis and our methodology. The third part presents the
mathematical and didactical potentialities of the PLIOX situation within the
framework of the Theory of Didactic Situations of Brousseau, in support of
Berthelot and Salin's works, and according to a cognitive and semiotic point of
view of Duval. According to this previous part, we clarify and analyze the
results obtained from implementations in two classrooms (part four).
