They could get to know each other without supervision.
and
They had a cheap fast mode of transportation to go to places and to get to school, home and work without the expense of a car.
President Roosevelt was born during the Industrial Revolution where everything from the workforce to travel is transitioning from manual to mechanical. Railroads were the epitome result of Industrial Revolution. It erased the separation of countries due to its distances, paving way for new commerce. It made towns along the railway thrive. However, it also meant that those who had the control of the railway system can have the control of the land. Roosevelt was instrumental in stopping wealthy railroad owners from taking control of the American West when he implemented the Sherman Anti-Trust Law.
The answer is the annular eclipse
the 19th century and the beginning of factories, railroads, and assembly lines. Many people saw the benefits of industry--new careers, faster ways of making products, and easier transport of goods across the country. Other people saw the disadvantages--pollution, tradesmen being replaced by factories, and low-quality goods.
The Lorax by Dr. Seuss is such a great example of both points of view, and children can often learn better from an entertaining picture book than a social studies text at any age. The Lorax stands for the view of the environmentalist, and the Once-ler is all about industry, money, and making his thneeds. You can use The Lorax to introduce the Industrial Revolution to students.