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

I expand and expand, and slowly I drop. A pin in your hand, and watch me go pop!

Depending on who you ask, I can be a cold projectile, I can be a cocktail, or I can make a situation become graver the longer it lasts. What am I?

On a canvas, colors dance and play, A silent story woven in a visual array. Brushes whisper secrets in vivid display, Capturing moments that never fade away.

I’m narrow, I’m nimble, I cut through the tide, with paddle in hand, a lone rider glides. I read the same forward as I do behind, what am I that floats on waves so wide?