This is an activity book appropriate for middle-school students and older that introduces the Multispecies Ovary Tissue Histology Electronic Repository (MOTHER) project. The activity book defines the ovary and provides images of ovary tissue histology from nonhuman primates. Activities include a crossword puzzle, color by number, draw the other half of a uterus, draw yourself as a researcher, a mad-lib, wordsearch, and more. Answers to the puzzles are provided. Disclaimer: The MOTHER project was funded by the U.S. National Science Foundation (DBI-2054061). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.