In August 2010 an unusual structure appeared in Burgess Park - 'Rosy the Ballerina', an inflatable bubble-like pavilion that has been touring London's parks and green spaces providing an extraordinary arts space for local communities. This short documentary commissioned by Tate Modern follows Rosy's day at the Mix Festival at Burgess Park and the DIY instrument making workshops run by Juneau Projects and Tate Modern taking part inside.