The fourth day snowflake is another one that I've made in the past and a fairly easy pattern to follow:
The Fourth Day of December snowflake, tatted with Olympus 40.
I decided to use two different variegated threads. What's nice about
this one is that you can work the snowflake continuously because of how
the second round starts with a chain coming up from the last chain of
the first round... it's always good when you don't have to cut and hide