Speakers at Talking Point, The Playable City seminar at The Gallery in Farringdon, London, on 7 May, outlined views on what city "play" means and how best to provide it.
Noel Farrer, of Farrer Huxley Associates, wanted to bring play into general public space. He said: "They don't get some levels of complexity around play. If you put play in a box with fences all around, then it ticks all boxes."
Some councils, meanwhile, do not follow recommendations for play. One project devoted 2.5sq m per child to play against the GLA's 10sq m, he said.
Anna Strongman from Argent also faced "partner challenges" but showed how private funding and a willingness to experiment could help. One idea, a bird cage swing commissioned as an art project, has become "amazingly popular".