The contest requires to design the Miku's costume using the jewels of snow or ice theme. The winner's design will be used for the actual Nendroid Snow Miku 2012 product in this winter. You have to register the PIAPRO website to join the contest. The contest is running from May 31 to June 20.
Nendoroid Snow Miku 2010
Nendoroid Snow Miku 2011: Snow Playtime Edition