You haven't? Then what did you go to the mountains for? The whole point is making them white and pretty, then get the snowballs rolling. Maybe shake a tree or two while someone passes by to make them snowy too.

[♫SNOWMEN ARE BETTER THAN PEOPLE♫ Jack is really confused right now. He feels bad for Elsa, of course, she's obviously been through some trouble. But there is certain amount of... dumbness in this story that makes him, well, angry.]

Sooooo they didn't know what do with it and tried to hide it instead? That's... yeah, really stupid. You should've frozen their underwear, now how is that for practice?