~9 Things Invented or Discovered by Accident~

We tend to hold inventors in high esteem, but often their discoveries were the result of an accident or twist of fate. This is true of many everyday items, including the following surprise inventions.

1. Play-Doh

One smell most people remember from childhood is the odor of Play-Doh, the brightly-colored, nontoxic modeling clay. Play-Doh was accidentally invented in 1955 by Joseph and Noah McVicker while trying to make a wallpaper cleaner. It was marketed a year later by toy manufacturer Rainbow Crafts. More than 700 million pounds of Play-Doh have sold since then, but the recipe remains a secret.

2. Fireworks

Fireworks originated in China some 2,000 years ago, and legend has it that they were accidentally invented by a cook who mixed together charcoal, sulfur saltpeter -- all items commonly found in kitchens in those days. The mixture burned and, and when compressed in a bamboo tube, it exploded. There's no record of whether it was the cook's last day on the job.

3. Potato Chips

If you can't eat just one potato chip, blame it on chef George Crum. He reportedly created the salty snack in 1853 at Moon's Lake House near Saratoga Springs, New York. Fed up with a customer who continuously sent his fried potatoes back, complaining that they were soggy and not crunchy enough, Crum sliced the potatoes as thin as possible, fried them in hot grease, then doused them with salt. The customer loved them and "Saratoga Chips" quickly became a popular item at the lodge and throughout New England.

Eventually, the chips were mass-produced for home consumption, but since they were stored in barrels or tins, they quickly went stale. Then, in the 1920s, Laura Scudder invented the airtight bag by ironing together two pieces of waxed paper, thus keeping the chips fresh longer. Today, chips are packaged in plastic or foil bags or cardboard containers and come in a variety of flavors, including sour cream and onion, barbecue, and salt and vinegar.

4. Slinky

In 1943, naval engineer Richard James was trying to develop a spring that would support and stabilize sensitive equipment on ships. When one of the springs accidentally fell off a shelf, it continued moving, and James got the idea for a toy. His wife Betty came up with the name, and when the Slinky made its debut in late 1945, James sold 400 of the bouncy toys in 90 minutes. Today, more than 250 million Slinkys have been sold worldwide.

5. Saccharin

Saccharin, the oldest artificial sweetener, was accidentally discovered in 1879 by researcher Constantine Fahlberg, who was working at Johns Hopkins University in the laboratory of professor Ira Remsen. Fahlberg's discovery came after he forgot to wash his hands before lunch. He had spilled a chemical on his hands and it, in turn, caused the bread he ate to taste unusually sweet.

In 1880, the two scientists jointly published the discovery, but in 1884, Fahlberg obtained a patent and began mass-producing saccharin without Remsen. The use of saccharin did not become widespread until sugar was rationed during World War I, and its popularity increased during the 1960s and 1970s with the manufacture of Sweet'N Low and diet soft drinks.

6. Post-it Notes

A Post-it note is a small piece of paper with a strip of low-tack adhesive on the back that allows it to be temporarily attached to documents, walls, computer monitors, and just about anything else. The idea for the Post-it note was conceived in 1974 by Arthur Fry as a way of holding bookmarks in his hymnal while singing in the church choir. He was aware of an adhesive accidentally developed in 1968 by fellow 3M employee Spencer Silver. No application for the lightly sticky stuff was apparent until Fry's idea. The 3M company was initially skeptical about the product's profitability, but in 1980, the product was introduced around the world. Today, Post-it notes are sold in more than 100 countries.

7. Silly Putty

It bounces, it stretches, it breaks -- it's Silly Putty, the silicone-based plastic clay marketed as a children's toy by Binney & Smith, Inc. During World War II, while attempting to create a synthetic rubber substitute, James Wright dropped boric acid into silicone oil. The result was a polymerized substance that bounced, but it took several years to find a use for the product.

Finally, in 1950, marketing expert Peter Hodgson saw its potential as a toy, renamed it Silly Putty, and a classic toy was born! Not only is it fun, Silly Putty also has practical uses -- it picks up dirt, lint, and pet hair; can stabilize wobbly furniture; and is useful in stress reduction, physical therapy, and in medical and scientific simulations. It was even used by the crew of Apollo 8 to secure tools in zero gravity.

8. Microwave Ovens

The microwave oven is now a standard appliance in most American households, but it has only been around since the late 1940s. In 1945, Percy Spencer was experimenting with a new vacuum tube called a magnetron while doing research for the Raytheon Corporation. He was intrigued when the candy bar in his pocket began to melt, so he tried another experiment with popcorn. When it began to pop, Spencer immediately saw the potential in this revolutionary process.

In 1947, Raytheon built the first microwave oven, the Radarange, which weighed 750 pounds, was 51/2 feet tall, and cost about $5,000. When the Radarange first became available for home use in the early 1950s, its bulky size and expensive price tag made it unpopular with consumers. But in 1967, a much more popular 100-volt, countertop version was introduced at a price of $495.

9. Corn Flakes

In 1894, Dr. John Harvey Kellogg was the superintendent of the Battle Creek Sanitarium in Michigan. He and his brother Will Keith Kellogg were Seventh Day Adventists, and they were searching for wholesome foods to feed patients that also complied with the Adventists' strict vegetarian diet. When Will accidentally left some boiled wheat sitting out, it went stale by the time he returned. Rather than throw it away, the brothers sent it through rollers, hoping to make long sheets of dough, but they got flakes instead. They toasted the flakes, which were a big hit with patients, and patented them under the name Granose. The brothers experimented with other grains, including corn, and in 1906, Will created the Kellogg's company to sell the corn flakes. On principle, John refused to join the company because Will lowered the health benefits of the cereal by adding sugar.