For my current set of tips, I'm using the list " 101 Small Ways You Can Improve Your City . 35. Build swing sets for adults. With the value of play proven to be a source of stress relief and inspiration, there’s no reason grown-ups can’t get in on the fun. An increasing number of cities and designers are providing adults with places to relax, recreate, and workout. The 21 Swings project by Tous les Jours transforms a busy median in Montréal into a highly visible space for fun .