The stream of new dares makes each visit fresh and multifaceted, whether the visitor is a Garden first-timer or a regular.Visitors who don???t have their own mobile devices can borrow SCVNGR-equipped iPod Touches at the lobby desks inside the Walker???where challenges will also soon be popping up. ???Summertime in the Sculpture Garden is the ideal time and place to introduce SCVNGR.??? says Robin