Vocabulary for Mrs. Frisby and the Rats of NIMH by Robert O'Brien Visit Gamequarium, for more learning games and activities! Tools See a list of terms used in these activities. Matching Flashcards (Java / non-Java) Concentration Word Search Activities created by: Diana Dell, Ed.S This activity was created by a Quia Web subscriber. To learn how to make your own, just like this, click here.