Seventeen 18, 19... PlaygroundsSeventeen Playgrounds is a research project by Denisa Kollarov and Anna van Lingen on the work of the Dutch architect Aldo van Eyck (1918 1999), designer of hundreds of playgrounds in Amsterdam between the 1950s and 1970s, characterised by simple metal structures and concrete elements in which children could develop their own autonomy and creativity through play. The research began as a mapping of the few spaces still present in the Amsterdam