The board game Candy Land was invented for children quarantined in polio wards.

Bell and Pritchard only created the game to occupy their children's attention on vacation. As they continued playing the game, they began developing rules as-needed.

Almost all children likely used to contract poliovirus, but scientists suggest that when infants encountered it very early in life—due to poorer conditions and hygiene—they still had some maternal protection from pregnancy or through breastmilk, so the symptoms were more flu-like.

FDR contracted polio at age 39 and permanently lost the use of his legs. Eleanor Roosevelt persuaded him to stay in politics, then took on the task of maintaining his public profile—attending events, building relationships, and serving as his "eyes, ears, and legs" across the country.

Polio has a long history in art and medicine, dating back centuries. It includes a representation of an apparent polio survivor with a shriveled leg in ancient Egyptian art. See milestones in the history of polio in this timeline.

Bill Bell and then-Washington State congressman Joel Pritchard created the game as a way to entertain their bored children. They grabbed items they had on hand, using ping pong paddles to hit a wiffle ball over a hip-height badminton net.

Alfred Butts, a newly unemployed architect during the Great Depression, created Scrabble. But the game was named by James Brunot, who used the word to describe the most common action its players take part in: digging frantically.

“Memory Builder” was based on pinning historical events in their correct chronological order. It was test-marketed in 1891, but never took off. One critic said, “The game looked like a cross between an income tax form and a table of logarithms.”

This highly infectious disease is transmitted from one person to another, mainly when we eat virus-laden poop particles. Less frequently, contaminated food or water can transmit the virus, or people can be infected via respiratory droplets (from coughing or sneezing).

A lot of 19th-century British fantasy was often stiff; its children’s literature was often overly didactic. Carroll’s novel—about a young girl who falls into an unusual world full—was neither, offering vivid, psychedelic imagery and seemingly nonsensical word games.

Garnet Carter and his wife Frieda owned and operated Fairyland, a roadside attraction on Lookout Mountain in Georgia. While other mini-golf courses tried to mimic the regal courses of its parent game, the Carters built obstacles and decorations from items they had around Fairyland, effectively inventing the leisure-minded version of the game.

The bizarre board game that helps people communicate with the dead at sleepovers first emerged in the 19th century as a business-minded response to the growing fascination with spiritualism. The Ouija Board has since generated an abundance of sales, as well as scientific research.

These breathing devices, developed in the late 1920s at Harvard, were used to treat polio patients with breathing difficulties. Watch this video describing how these negative pressure devices work.

The American medical researcher developed the inactivated virus vaccine from 1952 to 1955 and proved that it could prevent disease. He tested the virus on himself and his family in 1954 and then carried out formal clinical trials on more than 1.3 million children.

In 1847, a Boston pharmacist invented a machine that automated the production of his pharmacy's medicinal lozenges and then formed the New England Confectionery Company, which later became part of the company now known as NECCO. By the late 1800s, they were producing cookies with Valentine-themed messages and eventually brought the romantic messages to their smaller lozenges, which they later called Sweethearts.

When Dr. James Naismith hung two peach baskets at either end of a Springfield College gymnasium, he was just looking to keep the school’s athletes occupied and safe during harsh New England winters, but the game he created would quickly turn out to be a national sensation.

The outdoor game experienced a surge in popularity during the 2020 pandemic because it could be set up in driveways, be played by all ages, and allowed for safe social interactions. That social aspect has helped pickleball’s popularity continue to rise post-pandemic. A March 2023 APP report showed 48.3 million American adults played the sport in the last 12 months.

The Pickleball for Incarcerated Communities League started in 2023 at the MacDougall-Walker Correctional Institution in Hartford, Connecticut, but has already expanded to other facilities across the state. Inmates say it's been transformative. The program has plans to expand to other states.

How pickleball got its name has been a point of contention for decades. The McCallums claim the family dog, Pickles, used to snatch the balls as they played and named it for him. Joan Pritchard, though, says Pickles didn’t join the family until after the game was invented.

Michael Underwood, an English physician and surgeon, was the first to describe the disorder, noting it caused disability in the lower extremities in children. Large-scale outbreaks of the disease were not observed until the late 19th century.

The world phenomenon of Harry Potter inspired millions of kids to read. The books, and the make-believe game quidditch (played by the hero), have inspired a real-life sport called Quadball, based on the fictional game involving flying broomsticks. Teacher John Ssentamu brought the game to his town of Katwadde in Uganda to bring kids—long absent from school—back to receive an education. A documentary crew filmed them playing in an inspiring story of education and community.

Affecting adults who contracted polio as children, this disorder can occur 15 to 40 years later, leading to slow, irreversible muscle weakening. Some research estimates that between 25% and 40% of polio survivors go on to develop this condition.

About 1 in 200 cases of infection causes paralysis. For paralysis to occur, the virus travels from the throat, intestines, and gut to infect specific cells within the spinal cord and brain stem that control movements. Within hours of invading the nervous system, paralysis can occur. The virus can be present in bodily secretions and stool for multiple weeks post-infection.

Tetris first appeared in the US at the 1988 Summer CES, where Henk Rogers—who would later publish and market the game—first encountered it. This interview revisits that moment, with creator Alexey Pajitnov and Rogers reflecting on how the game gained global recognition.

Pickleball has always been a game for all ages, but it has been particularly popular among seniors, in part because of its many health benefits, including enhancing hand-eye coordination and burning more calories than walking.

Public health funds and resources that were diverted to COVID-19 response reduced efforts to combat polio and vaccinations for polio and other diseases declined during the pandemic, putting more people at risk for polio.

Albert Sabin's live attenuated virus vaccine—requiring two drops in the mouth—didn't garner political support in the US, so it was tested in the Soviet Union in the late 1950s.

The role-playing game became popular enough to attract the ire of special interest groups, like Bothered About Dungeons & Dragons (or BADD) during the so-called "Satanic Panic" of the 1980s and 1990s, when parents believed the game was corrupting children.

King Kamehameha V authorized the removal of anyone with leprosy symptoms and for them to be placed in a medical facility later maintained by the Catholic Church on Moloka'i, Hawaii's fifth largest island. Patients weren't allowed to transfer to other medical facilities until 1969.

Klaus Teuber invented the game when he was in his 30s, and had his wife and children act as early test players. Published in 1995, the game has now sold over 45 million units.

When Steve Paranto kept losing in the finals of his Pickleball tournaments, he told his dad Arlen the wooden paddles were holding him back. Then-Boeing engineer Arlen used spare composite floor panels to make the first fiberglass Pickleball paddle.

The Rubik's Cube is the most popular puzzle toy in the world, with over 350 million sold since its invention in 1975. Originally created as a tool to teach three-dimensional movement, the colorful problem-solving game skyrocketed in popularity, spawning speedcubing competitions and becoming a fixture of global toy culture.

Since 1796, smallpox vaccines have used a live poxvirus related to smallpox. Yellow fever vaccines have used a live weakened form of the virus responsible for yellow fever since 1937.

Baum began writing stories for children while working as a traveling salesman and found success with 1899’s “Father Goose, His Book,” a book of nursery rhymes. Its popularity made him realize children did not want moral education; they wanted escapism.

University of Maryland Hospital researchers intentionally infected volunteers with the cholera bacterium in the late 1970s to further their understanding of the disease. They proceeded with this work following the recommendation of a US government panel.

While there are earlier variations on the game, the modern version appeared in 1979, though it was then called "Number Place." The game was slightly altered and renamed in Japan.