The content of this Degree Thesis is the design of a group of play installations for children of all ages, which resulted from the way children play, considering their needs and regarding their age. These installations function as a setting of a number of non predetermined activities that provide challenges and risk and in which each child can select freely how he or she will play.

 The study of children’s movements by means of diagrams, the experimentation with the possibilities of designing programs and the structural trials, curried out during this exploration, determined the course of the project and led to the final results.

 Vertebrae, architectural objects- play installations, are a group of octahedral units, topologically similar to one another, that receive play actions of all ages. Vertebrae can be placed freely in out-door places, alone or in groups, creating, each time, different results in space and qualities. Playing becomes a changing experiment.

 As the movement of each child is unique, likewise the different geometry and size of the vertebrae, combined in a different way, makes each installation unique in shape and aesthetic.