Christmas Riddles

Solve the riddles below and combine the answers to form a 20-character passphrase!

1. I sparkle and shimmer, atop the green. A symbol of hope, often seen.
2. I am cold, but I bring such cheer, Made of three balls, I disappear.
3. I bring gifts and laughter, a jolly sight. In a red suit, I fly through the night.
4. Hung by the fire, I'm filled with delight. With candy and toys on Christmas night.