The book shows how kids learn about engineering science and how their play and solutions equip them to understand grown-ups' actions later. Kids on teeter-totters learn about high-rise counter-balanced construction cranes; kids pushing other kids on wagons understand discussions of rockets launching heavy payloads into space; kids making snow-balls or making mud-clods (wet or dry to throw at their buddies) learn about cohesion plus about ballistics ; kids watching meteor showers phases of the moon and eclipses understand later explanations of astronomy; kids experience scrapes and bruises and then understand infections and topical medications; kids experience sticky and slick surfaces then understand traction and wet-road hydro-planing and adhesive residue; kids quickly learn about the need for insulation (lots of it in winter none in Texas summers) and therefore understand selection of clothing insulation of houses . insulation of Arctic pipelines; and much more. Active kids learn a lot!