friday, april 30

play the park-central park becomes a virtual board game for arbor day weekend. the "world park" is an interactive walking tour and trivia contest temporarily installed in the park, and anyone with a web-enabled smart phone can participate. upon arrival, everyone is given a map of the park with destinations to find, where they can scan "parkcodes," small digital trees, for interesting facts, questions and historical tidbits about the park. people can compete against their friends for correct answers with the built-in scorecards. download the scan reader ahead of time and bring headphones. also on saturday. central park entrance, 59th street and fifth avenue, 917-520-2892; 10 a.m. to 6 p.m., free.