Structural and complementary elements such as platforms, roofs, stairs, slides or educational panels have been connected with each other using aluminum clamps to facilitate the assembly of the device and replacement of components. Buckles equipped with a hinge ensuring high rigidity of the structure and easy assembly by screwing in only one screw. Aluminum is protected against corrosion by cataphoresis and powder painting with polyester paints, UV resistant with QUALICOAT approval.