Strapped for cash to buy art supplies after a trip to Africa in the early 80s, Al Taylor started fashioning sculptures from material found on the street, transferring his usual work on paper and canvas to three dimensions. Cans & Hoops – fashioned from plastic hula hoops, tin cans & wire – allows his 2-D drawings to come alive in real space. (At David Zwirner Gallery, through Oct 27th).