Ann Marie Stephens is the author of the Arithmechicks series as well as contributing writer for Kwame Alexander's The Write Thing. She was an elementary school teacher for more than 30 years. Jenn Harney is an illustrator and toy designer. She is the illustrator of Probably a Narwhal, Never Trumpet with a Crumpet, and ""Smelly"" Kelly and His Super Senses- How James Kelly's Nose Saved the New York City Subway, among others. Her work has been featured in Highlights for Children magazine.
""Kids who find math rigid or daunting will be charmed by this messy, busy story of nine kittens frantically scurrying around, planning a welcome home party for Grandma... the vibrant, page-filling illustrations do an especially effective job of capturing the chaos... this effortless introduction to estimation makes a great read-aloud and works equally well for very young audiences or as reinforcement for slightly older students, who might also enjoy the additional estimation challenge hidden in the book."" —Booklist