Like I did with Thanksgiving Items (yes they were bad, I'll be doing some items i want to see in Winterfest)

Weather Machine - Aurora
20000 gems in store only during Winterfest.

Candy-Cane
A hand item which gives the "Enhanced Digging" mod.

White Chocolate Block
Can be obtained in the world GROWCH.

Peppermint
A consumable when used gives the player a Sparkly White Colored Skin for 30 minutes.

Snowy Owl
An Hat item which gives the player the "Long Build" mod.

Gingerbread Mask
Can be obtained in the world GROWCH.

Gingerbread Suit
Can be obtained in the world GROWCH.

Gingerbread Hat
Can be obtained in the world GROWCH.

Gingerbread Shoes
Can be obtained in the world GROWCH.