1. The 1974 World's Fair in Spokane, Wash.
   The 1982 World's Fair in Knoxville, Tenn.
2. The 1984 World's Fair in New Orleans, La.

Jelly shoes were introduced to the United States at the 1982 World's Fair in Knoxville, Tenn., and the following year at a shoe expo in Chicago. It was at that February 1983 convention that the distinctive footwear really hit the map.

1. Bloomingdale's
   Macy's
2. Dillard's

A Bloomingdale's purchasing rep saw the shoes at the Chicago expo and ordered 2,400 pairs. Those jellies sold both on the sales floor and in the store's catalogue.

1. Polystyrene
   Polyvinyl chloride
2. Polycarbonate

Jelly shoes are often made out of PVC, or polyvinyl chloride, a commonly used material for a wide range of consumer products.

1. 2 billion pounds
   8 billion pounds
2. 14 billion pounds

In 2007, close to 14.2 billion pounds (more than 6.4 billion kilograms) of PVC was consumed by the United States and Canada, in the form of hundreds of everyday products.

1. It's cheap
   It's versatile
2. Both

PVC is versatile and cheap to manufacture. Products made with PVC also tend to be low maintenance and long lasting.

1. Through the process of extrusion
   Through the process of calendering
2. Through the process of injection molding

Jellies are often made through the process of injection molding. PVC resin, along with other additive ingredients, is heated, forced into shoe-shaped molds and then allowed to set.

1. A handful
   Dozens
2. Hundreds

When it comes to jellies, there are hundreds of offerings under the sun, from all sorts of brands at various prices.

1. They're uncomfortable
   They're expensive
2. They're inflexible

While some people think jelly shoes are perfectly comfortable, others beg to differ. They often cite biting straps and sweaty soles as the reasons they aren't fans.

1. Yes
   No
2. Yes and no

Crocs are sometimes lumped in with jelly shoes, but not according to purists. The shoes are made with a patented synthetic resin, but it's not the traditional PVC so commonly used to make jellies. But using a loose definition, one could say Crocs can be grouped with jelly -- or plastic -- shoes.

1. Definitely
   No way
2. Depends

Kids might have been the first to really jump on the jellies bandwagon, but adults took up the trend pretty quickly, too. Today, grown women, and to some extent, men, can buy jelly shoes as well. Some designer jellies are even pretty pricey -- up to $200 or more.