Names Of Mammals Word Search Game Online. This is an interactive online word cross puzzle for children to learn the classification of anmals as mammals. As students learn in biology, mammals are animals with unique characteristics such as having a backbone, having fur, having mamary glands and more. This lesson is a part of classification of animals lessons studied in 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade and more. This word search puzzle is fun and freely online. Word search finder on mammals.