Whether it's being part of a crowd rooting for a football team, an audience laughing in unison at a comedian's jokes, or maybe flashmobbing a train station, there's something special about communal experience. Pop Up Playground's Fresh Air Festival is all about bringing strangers together through fun, games, and complicity.

A series of activities will take place around Federation Square this weekend, all based around the theme of interaction and improvisation. Some are as simple as a tent where an artwork that has been left for a lucky stranger — on the condition that they make something for the next person to come along and discover. Then there are enormous, communal games that might have you carrying out secret missions, putting out fires, or even escaping a curse.

Fresh Air Fest is an anarchic, hilarious, and inclusive festival of pervasive games — you're guaranteed to leave with a new friend.

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