I use the sticks with a cut edge to make it more snowflaky but you can also use the regular ones or even smaller ones. I pre-glued the sticks the night before with tacky glue so they would be ready for him the next morning. He painted them all in white.
The versions I’ve seen online call for glitter to be put on when paint is wet, now that’s doable for older kids but he doesn’t paint fast enough to do so, therefore I put a line of glue on each “arm” of the snowflake and had him sprinkle glitter (his favorite!) on it.
If you do both sides, you could also hang them in the window