On Stuff You Should Know, Josh and Chuck explore the transformation of Play-Doh from a household cleaning product into one of the world's most popular children's toys. The story begins with the McVicker family's wallpaper cleaning company, Kutol Products, and follows their pivot when Kay Zufall noticed children using their non-toxic cleaner as a creative medium.
The episode delves into the science behind Play-Doh's distinctive properties, explaining the precise ratios of ingredients that give it its unique texture and consistency. It also tracks the product's evolution from a single off-white color to a diverse range of hues and themed playsets, including its adaptation to the digital age with iPad-connected 3D printers. The hosts explain how Play-Doh maintains its appeal through careful formulation of colors, scents, and textures.

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Play-Doh's journey from wallpaper cleaner to beloved children's toy began with the McVicker family's company, Kutol Products. When the demand for wallpaper cleaner declined due to the shift to natural gas heating, Joe McVicker, along with his sister-in-law Kay Zufall, discovered children using their non-toxic wallpaper cleaner to make Christmas ornaments. This discovery led McVicker to repurpose the product, adding an almond scent and partnering with Captain Kangaroo, who promoted Play-Doh on his show in exchange for 2% of gross sales.
Play-Doh's unique properties come from a careful blend of ingredients. The foundation consists of wheat starch and warm water, combined with petroleum as a lubricant to maintain its distinctive texture. The formula relies on a specific ratio of starches—25% amylose to 75% amylopectin—to achieve the perfect consistency. Surfactants help bind the lubricant to the starch, while additives like salt serve as preservatives and antimicrobial agents. The mixture also includes carefully formulated colors and fragrances to enhance its appeal to children.
Originally available only in off-white, Play-Doh expanded to include red, blue, yellow, and white in the 1950s, with many more colors added in the 1980s. The introduction of the Fun Factory playset by General Electric engineers in 1960 marked the beginning of specialized sets and themed collections. Under Hasbro's ownership, Play-Doh has continued to innovate, offering everything from Disney Princess themed sets to pizza-making kits. The company has even embraced modern technology, introducing Play-Doh 3D printers that connect to iPads for digital design integration.
1-Page Summary
The colorful and creative substance known today as Play-Doh has an unconventional history—initially starting as a wallpaper cleaner before becoming a beloved children's toy.
The company behind Play-Doh, Kutol Products, founded by Joe McVicker's father and uncle, was initially known for its wallpaper cleaner, which was used to remove coal soot from walls. However, as homes began to adopt natural gas heating, the need for wallpaper cleaner declined. It was Joe McVicker who took over the company from his father, Cleo, and along with his sister-in-law, Kay Zufall, identified a new opportunity. They noticed that a non-toxic version of the wallpaper cleaner could be repurposed when they discovered that children were using it to make Christmas ornaments.
Indeed, it was this creative use by children that inspired McVicker. Witnessing children make decorations from the wallpaper cleaner, McVicker saw potential for the substance to serve an entirely different market. This epiphany led to the rebirth of the wallpaper cleaner as Play-Doh, a non-toxic, malleable compound perfect for children’s play and modeling, which was officially created in 1950 and enhanced with a pleasant almond scent.
The History and Origin of Play-Doh
Understanding the properties of Play-Doh involves delving into the blend of chemical compounds and additives that give this popular toy its unique characteristics.
Play-Doh’s fundamental ingredients—a starch-based binder, water, and a lubricant—combine to create its distinctive pliable, non-sticky texture.
The formulation of Play-Doh begins with a mixture of wheat starch and warm water to create a gelatinous substance. To prevent the goo from drying out into a brittle material, a process known as retrogradation, a lubricant is added to the mix. Petroleum, as a lubricant, gives Play-Doh its moistness, ensuring that the substance remains malleable but doesn't stick.
Starches are polysaccharides, made of sugar molecules, and they form the structural basis of Play-Doh. The two primary types of starch in Play-Doh are amylose and amylopectin. Amylose tends to form straight chains, and amylopectin has a branched structure. The ratio of 25% amylose to 75% amylopectin is pivotal in achieving the ideal consistency for Play-Doh, preventing it from becoming either too dry or too sticky.
Surfactants play a crucial role within the Play-Doh recipe by suspending mineral oil within the compound. These surfactants have both hydrophilic and hydrophobic ends, letting them attract water and fats, respectively. This is essential in maintaining a homogeneous mixture, keeping the lubricant from separating and ensuring a consistent texture.
The Chemistry and Ingredients Behind Play-Doh
Play-Doh has become a classic toy with a storied history of diversification and innovation that has stimulated children's creativity through various colors, sets, and themed collections.
Originally available only in an off-white color, Play-Doh introduced its first colors in the 1950s: red, blue, yellow, and white. These foundational hues remained the only options until the 1980s, when the company expanded the palette to encompass a galaxy of colors, capturing every part of the rainbow and allowing children to express themselves with a broader range of shades.
Engineers from General Electric designed the Fun Factory playset for Play-Doh in 1960, which was the beginning of Play-Doh's expansions into specialized sets and themed collections under the Hasbro brand. The Fun Factory is a hand-pushed extruder that molds Play-Doh into various fun shapes, such as strands resembling spaghetti or thick ropes. There has been much jest about the amount of Play-Doh sold over the years and what it would amount to if all Play-Doh ever sold were extruded into one continuous rope through the Fun Factory.
Further expanding into licensing deals, Play-Doh now offers the ability to create dresses for Disney Princesses with its Play-Doh Disney Princess set. The tradition of making fake food has also been an enduring part of the Play-Doh experience, boasting sets where children can craft replicas of Pizza Hut pizzas or use sweeter, squishier textures of Play-Doh to simulate frosting in a sweet shop line.
Even whi ...
Evolution and Expansion of Play-Doh
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