Goal 4: make winter block (1) workshop, 1 hour, 12 stone, 2 living wood, 8 icy paste
Make winter beam (1) workshop, 1 hour, 12 wood, 2 living wood, 8 icy paste
Upgrade snow castle to level 4 - 2 colored yarn, 1 winter beam & 1 winter block (the ones you just crafted), 8 icy paste