Snowball Mod
I got this idea walking home from school today. We have about 2 inches of snow right now.
There could be plates called SnowBricks, and you click on the plates a few times to get a snowball. You could throw it like a grenade or a spear, but it wouldnt do damage.
Also: Is there a way to make a projectile permanently destroy a brick? If there is, you could make forts and people could attack it.