[Splat]

I used your method, Edd, of cheating and using creative mode; sorry boys and girls, but I didn't fancy collecting about 20 stacks of wool and dying it suitably to make something that'll be gone in three weeks. After Christmas I'll strip off the sleeves (to keep the house safe), take out his ice eyes (to stop them running) and golden buttons and then set fire to the boots; I'll let people know when so they can come and watch.
I started off planning to do a hat, then decided to do a beard too, and then the rest. The only other step would have been to replace the house with a present but that'd take too much effort to put back.

The spider crawling on its beard is part of the decoration. As were the three creepers that spawned inside its hat.