I went to this last year and on a scale of one to ten it was a 623.

International Yo-Yo Open and New York State Yo-Yo Contest
FREE to the public!
Date: Saturday, August 9, 2008
Time: 11:00 AM EST
Location: South Street Seaport, Pier 17 (Fulton & South Streets, New York, New York 10038)
Subway Directions: A, C to Broadway-Nassau St; J, M, Z, 2, 3, 4, 5 to Fulton St.