Free admission all day, as well as fantastic fun and educational hands-on activities, exploring how our world has been shaped by machines and the innovators who make them. Design and build your own working machine with craft sticks. Create perfect working three-dimensional models on a cutting-edge 3-D printer. See a working model steam engine. Free guided tours, scavenger hunts, pictures with Lulu the Lamb, and more. Visit www.athm.org.
