Snowballs are projectiles that have appeared in a number of Christmas events, starting in 2007. Since then, they have appeared in the 2009, 2010, 2011, 2012 and 2013 events. Players who completed the 2007 event can fill their inventory with them at any time of the year by shaking a snow globe.
When equipped, they can be thrown at other players by right clicking them and selecting the 'pelt' option. They are classed as thrown weapons in combat, and are classed as a fun weapon at the Duel Arena.
In 2007, they could be collected from piles of snow around Gielinor and the Land of Snow. During this event, they had an additional function: They could be used to make snowmen. This was done by right clicking them and selecting 'build'. This would result in a stacking of snow, eventually into a snowman. A hat could be given to players by an imp in the Land of Snow, and the hat could be used on the 'unfinished snowman' to bring it to life. The snowman (after life) would move and could be spoken to. The snowman would fight other snowmen, and hats would be dropped after melting.
One of the rewards for the event was a snow globe, which allows snowballs to be summoned at any time of the year. Their ability to build snowmen was removed after the event ended, however.
In the 2009 event, snowballs returned. They could be gathered from piles around the feast area in the Land of Snow. This time, the snowballs had no major involvement in the event, but were there simply for enjoyment.
Players without a snow globe could take them out of the event and even bank them, but they melted on 19 January2010.
In 2010, they could be gathered from piles of snow within two areas of the Heimland Games. One area was designed for snowball fights, and another for building snowmen. Snowballs regained their "build" option from 2007 during the event, but it only worked within a special area within the Heimland Games.
Like in 2009, snowballs melted after the event for players who did not also have a snow globe.