Cut 2 of your pipe cleaners in half. Take 3 of these smaller length and twist them together securely. Spread out the arms of your snowflake evenly, adjusting the twist to hold them steady as necessary. Cut the remaining half length in half again, and the remaining pipe cleaner into quarters. You should have 6 quarter lengths.
Twist a quarter length securely around each arm of your snowflake.
Your snowflake will sit nicely on your Christmas tree or on a shelf. If you would prefer to hang it in a window, tie a piece of thread securely around one arm of your snowflake.