They are giving away both the nendoroid and figma Snow Miku, which are super cute ;w; (honestly I’m not a Miku fan, but they look so pretty *grabby hands*).
You can check all the details here:
The site will be open only for 24 hours, on the date of the Wonder Festival! Good Luck!
Feb. 7, 2016, 10:00a.m. – Feb. 8, 9:59 a.m.(JST)
Feb. 6,2016, 5:00 p.m. – Feb. 7, 4:59 p.m. (PST)
Here are more picks of the Snow Miku.
(Pictures belong to Good Smile Company)
You can read a more in-depth review here.