The human brain contains an estimated 100 billion neurons, and browsing the Web, one might be led to believe that there's a Web site for every one of those cells. It's no surprise that there are lots of Web sites concerning the nervous system. After all, the human brain is toward the top of nearly everyone's list of favorite organs and of intrinsic interest to scientists and nonscientists alike. In this review, the author focuses primarily on three excellent Web sites that represent three very different approaches to Web design and educational media. At the end of this review, the author lists a number of noteworthy neuroscience Web sites but without extensive remarks. (Contains 6 figures.)