For me, it is these.

The Wii Games: Summer 2010 was a nationwide event hosted by Nintendo of America from July to September 2010, the event I went to specifically was held from July 16th-18th, 2010 In Liberty State Park. (or at least, from what I can remember, not much info about the event appears online, but judging by me having these lanyards and badges, it would make complete sense for this to have been the event I went to, because I definitely remember it being a park and outdoors, and definitely remember being in Jersey that day) I thought it was interesting because it seems like a event that doesn't get talked about online all too often.