Learn about the science behind a crash with the Crash Test Lab from International Playthings. Designed for ages 8 years and older, this lab teaches children about the properties of physics. Crash Test Lab's cool customizable Cart comes with a removable roll cage, two types of bumpers, and a safety harness---plus Impact Jack, the only crash test dummy that comes with an electronic sensor that measures the force of the crash. Includes an activity book that demonstrates how Newton's Laws of Motion relate to car crashes and car safety, and provide ideas of crash test experimentation. 2 AAA batteries required (not included). A great way for kids to practice S.T.E.M. skills. Package measures: 13" x 11" x 2.5".