Snowballs was a feature introduced for Winter 2008. It replaced the ordinary Water Balloon feature, but acted the exact same way. The only difference between the Water Balloon and the Snowball was the object being thrown.
The feature was removed in Spring 2009 and replaced by the returning water balloons. These snowballs were not seen again in YoWorld, even though many players found them fun and original.
They have been asked for almost every winter by players who enjoyed using them the first time.
Snowballs were reintroduced in winter 2016.
There was a community snowball throwing event where players received an prize.