rideable reindeer,

sled mobile,

jack frost powers (like ability to shoot snow out of hands either freezing or damaging player, or just covering them with snow)

magic hat that morphs you into snowman

lighter than can light those oildrums on fire and when u stand near it you do the 'cold' gani (maybe heal u a bit too)

a lil more complex: ability to make igloo that when u walk into entrance, warps u to a small level where you can just hang with friends maybe decorate a bit (melts in maybe 15 minutes or so so players dont spam, can stay inside level as long as you want however)

a stick (brings up a small window where you draw something simple and when your done draws it in the snow)