When we were in Germany (fifth grade) we lived in an apartment complex, with a park in the middle. When it snowed really bigtime we built a fort out of snow, maybe three feet thick and seemed like eight feet tall, and the really cool part was we built it with no doors. To get in, you had to climb up the slide and slide in. This was for protection against the guys in the neighboring complex, who also had a snow fort. When they tried to come down the slide, we blasted 'em.