1) Print sleigh-red_v2.stl in red or white. I recommend using raft for this part.
2) Print sleigh-skis_v2.stl in gold, silver or white and attach.
2016-12-14 update: Santa's Sleigh v2 has been redesigned for easier printing and assembly.
It's an easy print and looks good in almost any two colors!
The sides are deliberately a tight fit and should not require glue. I find it easiest to fit the front tip of the side-piece first, with the rear end of the part a little lower, then bend the rear end up and press it into place.
Add a small sack of candies or chocolate kisses and give the sleigh as a gift, or string a ribbon and hang it as an ornament.