‘We need a crowd next weekend,’ says David. ‘Please be in it.’ Tomás Saraceno’s Oceans of Air opens with a two-day art and music extravaganza next Saturday 17 and Sunday 18 December. Kimbra, Sumner and more on the main stage, plus heaps of other stuff. Outside the party is free, but you’ll need a ticket to get inside (where the party continues) and see the exhibition. Catch the ferry.