The see-saw comprises a support (1) and a central swing beam (2). A second beam (3) is swivel mounted on the support parallel to and above the first beam. The two beams are connected together at the ends on each side by a vertical lever (6,7) which projects upwards and swivels on the two beams. The beams and levers can form a parallelogram assembly. The angle between the levers and beams can be altered during the see-saw movement although the beams and the levers remain parallel.
