I can hide in the attic or drift in the wind, I’m soft as a whisper but born from heat. I vanish with water, yet I tell of fire’s past. What am I?

I’m a small burst of happiness, often sold by the piece; A rebel of reason that hurts waistlines and teeth. I vanish too swiftly, though long I’m pursued, A wrapper of promise, temptation renewed.

Iconic in destruction, Waste away, defined, Won't swallow what I'm fed, In case you change your mind

In the cupboards I'm found, my patterns are sure to charm her. I'm stepped on the ground, or on a charming knight's armor.

Before me you wait, you’re but one in a line. Through me you travel, only one at a time. I may require a card or a coin. Beyond me you continue, other entrants you join. My task unending - greet the crowd single file. My purpose accomplished, I am a