Step 1: Making the Snowflakes
Be ready to make lots, the mobile pictured in the introduction has around 40.
Step 2: Arranging the Snowflakes
To nicely distribute the flakes i made five threads with four flakes, five threads with three flakes, eight threads with two flakes, and eight threads with one flake.
I arranged the smaller snowflakes so they hang below larger ones on the string. Additionally I made sure to hang different types on the same thread.
Step 3: Attaching the Snowflakes
The inside ring is comprised of five threads with four snowflakes and five threads with three snowflakes. They are arranged evenly around the ring.
The outside ring is comprised of eight threads with two snowflakes and eight threads with one snowflake. They are arranged evenly also.
Finally, when tying the strings to the ring i made sure that some were 2-3cm (1") away from the ring while those next to it were 5-6cm (2-3") away from the ring. It makes the mobile look mire dynamic.
Step 4: Finishing Up
Tie the two rings together with some threads and also attach some thread by which you can hang the mobile. I also glued all the knots over with some crafts glue to make sure they held.