How the beloved state fair grew from livestock showcases to cornucopias of amusement

There's something for everyone at a state fair — petting zoos, live music, fried foods.

For many states in the U.S., summer to fall is the season for the annual state fair. The country's first state fair dates to the 19th century, when locals would showcase livestock, crafts and agriculture.

State fairs of today share the same elements, but have evolved into something like pop-up theme parks. They remain a favorite American pastime, contributing $30 billion to the U.S. economy each year, said David Grindle, CEO of the International Association of Fairs & Expositions.

Here's a look at how state fairs began, and what keeps them going year after year.

The state fair's agricultural roots remain

State fairs began as agricultural competitions, which the British brought with them as they col