Mammal Characteristics Freebie! What makes a mammal a mammal? Find out with this fun FREEbie! Included: Mammal Characteristics Fact Sheet and two Mini Books (differentiated levels.) There is also a complete pack that includes: posters, puzzles, games, flash cards, printables, writing prompts, informational text with comprehension checks assessments and more! The Complete Mammal Characteristics Fact Pack includes more than 60 pages for only $5.00!