Visitors at Nada can spin the art world wheel of fortune at P! gallery's booth. When collectors buy one of the artist Wong Kit Yi's work, 10% of the proceeds will go to charity—but you won't know which one until you spin the colourful wheel labelled with the names of art non-profits, including SculptureCenter, W.A.G.E., Nada and Triple Canopy. Most of the organisations have booths on site, so the dealers will cut a cheque right on the spot and walk it over to the winner. Another surprise comes when collectors actually receive their works: Wong sells (for $4,000 each) a customisable plan for an art object, but won't actually make it until this autumn when she goes on a three-week residency at the North Pole.