Lights, Camera, Action Potential: Neuroscience for Kids! (Portal)

http://faculty.washington.edu/chudler/ap.html

The above link includes links to games and other sites. For example, here is a word search link included on it:

http://faculty.washington.edu/chudler/java/searchap.html

You can also get to more topics here:
http://faculty.washington.edu/chudler/introb.html