wrapping paper (n): specially decorated paper (usually with pictures of snowmen, Christmas trees, Santa Claus (etc.) used to wrap Christmas gifts
a card (n): a greeting card (like a birthday card) which you send to your family and friends around Christmas time
a tree (n): a pine tree (an evergreen tree) with leaves like needles which people put in their house around Christmas time and decorate with fairy lights, ornaments and tinsel
a wreath (n):a circle of fresh or dried flowers or leaves which people hang on their front door around Christmas time
a pudding (n): a traditional dessert made of dried fruit soaked in alcohol, eaten on Christmas day
an ornament (n): a decoration (a small ball, toy or piece of chocolate) which is hung on a Christmas tree