If you are looking for a general way to ask someone what they want for Christmas, you could say "What's on your Christmas wish list this year?" or "Have you been good this year? Maybe Santa will bring you something special!" You could also ask more specific questions like "Have you been dreaming of a new bike or toy?" or "What's your favorite candy? I'm thinking of making a holiday mix." Remember to listen carefully to their response and try to make their Christmas wishes come true!