In this new take on the Skill Builders readiness sets, the science is happening inside all of us! Kids learn about the inner workings of the human body with age-appropriate activities and 3-D pieces for enhanced hands-on learning. Learn the names, functions and locations of organs, systems and more. Includes a full-color write-and-wipe guide with worksheets. Package size: 10.6 x 9.8 x 4 in. Ages 4+.