For a child, a good Christmas gift could be something that is age appropriate, educational, and fun. Some popular choices for young children include toys like dolls, action figures, board games, and puzzles. For older children, gifts like books, music, video games, and electronic devices can be a great option. Ultimately, the best gift is one that the child will enjoy and use. It's also important to consider the child's interests and hobbies, as well as their specific needs and preferences.