Poor Nolan, having arrived only 20 months after his big brother, doesn't really NEED any toys for Christmas. We have several infant toys left over from Matthew, including various Roll-a-Rounds and squishy blocks. With Nolan's hearing loss, I thought about getting some toys that would be visually interesting that also have an auditory component. I found the "Wave Drum" by Edushape that has a clear panel and beads that dance when the drum is sounded. Target sells this one, so I picked it up for Christmas. I also saw a rainmaker (with colorful beads) that I might pick up. Of course, he is also getting more traditional baby toys, but I might as well pick up ones that are going to be helpful to his specific needs as long as I am out shopping!
I also found some educational supply stores-
There is also a catalog by Toys R Us that promotes toys for kids who need extra help in specific developmental areas. I'll have to look up the link for that one.