These were made by two grown men. They made the Spongebob using blocks of snow (I suspect that a rectangular cooler may have been used) and paint, presumably. The snowman was made with the asistance of a truck bed--they had to form the balls in the truck bed and somehow stack them. It was pretty epic.
At this point both have melted back into the ground, but they were pretty cool while they lasted. :D
Your random hostess,