While you’re in line, you might as well be choosing what ice cream to enjoy. Usually this ends with the favorite one being taken by the person in front. Instead of wasting time asking about what ice cream flavors are in stock after the moment of sorrow, you see them in advance:

GUM, Moscow

And it’s extremely easy to take a certain flavor off the menu for the ice cream seller.

The only way to further improve this is to put the price up top, let go of the decorations, and stop repeating the words “ice cream”.