Angry Birds Seasons Winter Wonderham level 1-6 was first available on Thursday, December 6th, 2012. Fling the first Orange below the first structure, through the wooden block. This should detonate the tnt box and clear the left side of the level. Then aim the second bird towards the rightmost tnt to clear the level.
Bonus! Our Winter Wonderham level 1-6 Mighty Eagle walkthrough is live as well!
Alternatively, there is a one-bird solution. Send Orange below the first structure on the ice surface, and trigger slightly before reaching the vertical stone block. With a little bit of luck, debris can trigger both tnts, clearing the level. The score in the video below is 152,070.