Before technologies like television and the Internet were invented, the public's best opportunity to take in the latest innovations and inventions was at expositions, which were large, fair-like shows that were mounted for months at a stretch. In this tale, a group of wide-eyed Boy Scouts are awed by steam locomotives, a transcontinental telephone line, car races, and the Liberty Bell. It's a great way for young readers to get up close and personal with the then-cutting-edge technologies that wowed crowds nearly a century ago.