My son likes string, comic books, a lot of kids like sensory lights. One thing I will say is if he doesn't like toys, don't stress too much or feel bad about it not being the typical Christmas experience.

Does he have any interest in making music? A little keyboard or harmonica can be really great. :)

Maybe sensory items with Christmas theme? For Halloween my son's teacher gave her students popcorn and a ghost toy that lights up and glows in the dark when you shake it. There are a lot of fun things available on Amazon.com.

My son did like puzzles by Melissa and Doug at that age, they were a big hit.....