Toys from the 1950s, '60s, and '70s capture the joy of play and the pure fun of being a kid. But beneath those iconic names are rich veins of nostalgia, memory, and history. These toys—and the stories of the kids, parents, child-rearing experts, inventors, manufacturers, and advertisers they affected—reflect the dynamism of American life.<br /><br />Senior exhibit developer and best-selling author Kate Roberts, along with senior curator Adam Scher,...