Did You Know? “Cheaper by the Dozen,” written by Frank and his daughter, Ernestine Gilbreth Carey, is based on Frank, Lillian and their 12 children. 2. Focus on the incremental study of motions and ...

Common Sense Media's unbiased ratings are created by expert reviewers and aren't influenced by the product's creators or by any of our funders, affiliates, or partners. Common Sense is dedicated to ...