Step 1: the Snowman
Build the basic shape of your snowman by using three different-sized spheres, measured 30 mm, 25 mm, and 20 mm. Add two small cylinders on the top sphere for eyes. Group everything together and color white. Add the snowman's costume: the buttons are flattened diamonds; the pupils are small domes; the nose is a long, thin cone; and the pipe is two cylinders grouped together.
Step 2: the Hat
The snowman's hat is pretty simple, just use a thin torus wrapped around a thin tube, and all of that under a cylinder. Group it all together and color black.
Step 3: Decorations
First, use letters to spell out whatever you want, I put MERRY CHRISTMAS. then, use a thin torus as a ring so you could hang it up somewhere. On one end, make an ornament out of two domes, one thin tube (in the middle to keep it together) and one thin torus on the top. Hang this on the left side, and make a present out of a box, eight flattened cubes, and a flattened tube for the right side.