Snowballs is one of the Cosmetic features on Minecraft Central. It was added in 1st April 2016 and belongs to the category Lobby Gadgets. It only works in the Lobbies. When used, the gadget throws a snowball at the direction you are looking at. The item in your hotbar is 8 snowballs. The snowballs refill about every second.
The only way to obtain this feature is by getting it from a Cosmetic Treasure. The gadget can be enabled in Lobbies through the Cosmetic Menu.