the invention is an element for use in children and books and puzzles. the first version of the constructor contains a flat rectangular base and the connecting node. a connecting node placed under four groups of protrusions. in the first group of projections are made with longitudinal cross section.projections of the second group are tube in cross section in the form of a square. the third group of the projections made in the form of rectangular plates with bumpers on the short sides, u043du0430u043au043bu043eu043du0435u043du043du044bu043cu0438 to each other by a gap. in the fourth group of projections are located in the corners of the grounds and implemented in the form of a corner, the shelves which are perpendicular to the ground.the second version of the constructor contains three of the four groups of protrusions. variants of the invention provide enhanced functionality of the designer.
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