My daughter has done some xmas fancy dress stuff and has been a fairy and her and the grey pony she had wore wings and lots of silver and lilac tinsel and obviously white sheet etc!! She has been a reindeer with a stuffed fur costume and a reindeer hat cover and bay pony wore antlers. Last year she was an elf with all red and green costume with lots of bells and flashing fairy lights, pony wore a xmas checked green and red table cloth fashioned into an excercise sheet. She has also been a xmas pudding. Needless to say, she is refusing to dress up for it this year, other than a bit of tinsel!! Asda and cheap home stores do a great selection of xmas costumes nearer to the time and are only about £10 to £15 and you can jazz them up a bit. Sometimes cheaper and easier than making from scratch. You could wear all green with brown jods and hang baubles off you and those battery powered xmas lights, stick a fairy or a star to the top of your hat and be a xmas tree,