The Snowball is an item owned by D.W.. It was from what D.W. described as the "best day ever." So she decided that she needed something to remember the day. The snowball has an episode entirely based off it, D.W.'s Snow Mystery. She gets attached to the snowball and cares for it, but then all of a sudden the snowball dissapears. She accuses her brother Arthur as the snowball thief. Nobody actually knows what happened to the snowball. The night before lost it she had a creepy dream where she was dancing with the snowball and it melted. However, there have been two theories as to how it went. At the end of D.W.'s Snow Mystery, aliens are in their spaceship with the snowball and one of them says: "I told you they would never find out". Also, during Through the looking glasses, D.W. picks out her snowball out of Arthur's trash can and then walks off contently with it.