Lego

• 1. Introduction

  ›

  Lego produces approximately 36 billion plastic bricks every year, which works out to about 1,140 elements per second, every second, around the clock. By recent count, 600 billion individual Lego parts have been made since production began. That is more than 75 pieces for every person alive on Earth. And every single one of those pieces can still connect to every brick made since 1958.

  This is not a story about a toy that got lucky. It is a story about a Danish carpenter who started making wooden toys in 1932, who coined a motto in 1936 that his company still uses today, and whose grandson's conversation with a buyer in the 1950s changed how children play for generations. It raises a question worth sitting with: how does a small-batch wooden-toy workshop in Billund, Denmark, become the largest toy manufacturer in the world by sales?

• 2. A Carpenter's Workshop

  ›

  Ole Kirk Christiansen was born in 1891 and died in 1958, the same year his company filed a patent for the modern Lego brick design. He started making wooden toys in 1932 from his workshop in Billund, a town in rural Denmark. Two years later, he named his company "Lego," drawn from the Danish phrase meaning "play well."

  Christiansen created his company motto, "only the best is good enough," in 1936 to push his workers to never cut corners on quality. It was not a slogan for customers; it was a directive for his staff. The Danish phrase translates more literally as "the best isn't excessively good," which carries a slightly different charge: high standards are not a luxury.

  In 1947, Lego expanded into plastic toys. Two years later, it introduced an early version of the interlocking brick, calling them "Automatic Binding Bricks." Those bricks were not invented from scratch. Lego had received a sample of the Kiddicraft Self-Locking Bricks, designed by British inventor Hilary Page in 1939 and patented in the United Kingdom in 1940. Lego's sample came from the supplier of an injection-molding machine the company had purchased. The early bricks were made from cellulose acetate, a material that would later be replaced.

  A Danish trade magazine called Legetøjs-Tidende visited the Lego factory in Billund in the early 1950s and wrote that plastic would never replace traditional wooden toys. By 1951, plastic toys already made up half the company's output.

• 3. The Brick That Clicked

  ›

  Godtfred Christiansen, Ole Kirk's son, became the junior managing director of the Lego Group by 1954. A conversation he had with an overseas buyer planted the idea of a unified toy system, where every set would be compatible with every other. The bricks of the early 1950s were not quite ready for that vision. Their locking ability was limited, and the range of things they could do was narrow.

  On the 28th of January 1958, a patent application for the modern Lego brick design was filed in Denmark, with applications in other countries following over the next few years. The core change was a system of tubes inside the brick that gripped the studs of the brick below it. That geometry is what makes two Lego bricks from 1958 still interlock with bricks made today.

  Five years after the patent, in 1963, the original cellulose acetate plastic was replaced by acrylonitrile butadiene styrene, known as ABS. ABS is harder, more stable, and holds color better. Lego has used it ever since.

  The manufacturing tolerances required to make this system work are striking. Lego's injection-molding machines operate within a tolerance of 10 micrometres. The moulds are permitted up to 20 micrometres of variation to ensure the bricks stay connected after cooling. Out of every million bricks produced, about 18 fail to meet the required standard. Those bricks do not ship. In a test conducted by the BBC's More or Less program and the Open University's engineering department in December 2012, researchers found that a 2x2 Lego brick can withstand a force of 4,240 newtons before failing. Their calculations suggested it would take a stack of 375,000 bricks to crush the one at the bottom.

• 4. Scale and Manufacturing

  ›

  Lego's moulding plants today operate in Billund, Denmark; Nyíregyháza, Hungary; Monterrey, Mexico; and Jiaxing, China. Brick decorations and packaging are handled at the Denmark, Hungary, and Mexico facilities as well as at a plant in Kladno, Czech Republic.

  The scale of what those plants produce is hard to picture. According to a 2006 article in BusinessWeek, Lego was at that point also the world's largest manufacturer of small rubber tyres, producing about 306 million of them per year for its vehicle sets. That claim was repeated in 2012.

  In April 2023, Lego broke ground on its first United States manufacturing facility, near Richmond, Virginia. The investment will exceed $1 billion once the plant is completed. The 340-acre site is designed to be carbon-neutral, with rooftop and ground-mounted solar panels and an on-site solar plant rated at 35-40 megawatts, enough to generate the equivalent of powering 10,000 American homes. In April 2025, Lego opened its sixth factory worldwide, in Vietnam, which the company described as its most environmentally sustainable facility to date.

  Sustainability concerns have shaped the company's planning for years. In 2018, Lego set a self-imposed 2030 deadline to find a more eco-friendly alternative to ABS plastic, and that year invested about 1 billion kroner while hiring 100 people to work on the problem. The company's researchers had already tested around 200 alternative materials by then. In 2021, Lego announced it would try making bricks from recycled polyethylene terephthalate bottles, but reversed that decision in 2023 after finding it did not actually reduce carbon dioxide emissions. Lego factories already recycle all but about 1 percent of their plastic manufacturing waste.

• 5. Sets, Records, and Grown-Up Builders

  ›

  Lego City, a line depicting city life, launched in 1973. Lego Technic, aimed at complex machinery, followed in 1977. Minifigures, the small humanoid characters that now appear in most sets, arrived in 1978. The Duplo line for younger children had been introduced in 1969, with blocks twice the dimensions of standard bricks in every direction.

  Licensed themes changed the company's profile dramatically. Star Wars, Indiana Jones, Harry Potter, Batman, Marvel, and Minecraft all became Lego sets over the years. In 2015, Lego said publicly that it wanted to rely less on licensed themes and more on its own original characters. The commercial pull of licensed themes remained real though: the Star Wars Millennium Falcon set designed by Jens Kronvold Fredericksen was released in 2007 with 5,195 pieces and was at the time one of the largest commercially produced Lego sets ever. A redesigned Millennium Falcon released in 2017 held 7,541 pieces. It has since been surpassed by the Lego Art World Map, which contains 11,695 pieces.

  In May 2013, the largest Lego model ever built at that point went on display in New York City: a one-to-one scale replica of a Star Wars X-wing fighter made from more than 5 million bricks.

  The 2020 launch of sets aimed at adults aged 18 and up marked a deliberate shift in who Lego considers its audience. By 2024, nearly 15 percent of Lego sets released in the United States were aimed at adult builders. The timing coincided with pandemic-era lockdowns, when many adults picked up Lego kits as a way to spend time at home. The Eiffel Tower set introduced in 2022 consists of 10,001 parts and stands as the tallest Lego set ever produced.

• 6. Robotics and Prosthetics

  ›

  In 1999, Lego launched its Mindstorms robotics line, built around a programmable brick whose origins trace to a project at the MIT Media Lab. The product's name came from a paper by Seymour Papert, a computer scientist who developed the educational theory of constructionism and whose research had at times been funded by the Lego Group.

  Mindstorms sets included sensors for touch, light, sound, and ultrasonic waves, with an RFID reader sold separately. The programmable brick evolved through several versions; the final one was called the EV3. Programming in the earliest iterations required uploading code via an infrared transmitter. Later versions used Bluetooth or a USB cable. Unofficial programming languages for the platform also emerged over time. The line was discontinued in 2022.

  Before it ended, Mindstorms found an unexpected application in medicine. Carlos Arturo Torres, a Colombian designer based in Chicago, used Mindstorms hardware to develop the Iko Creative Prosthetic System, a modular prosthetic limb designed for children. The system used myoelectric sensors to detect muscle activity in the residual limb and translate it into movement. An engine compatible with Mindstorms sat inside the prosthetic body. Children could customize what attached to the end of their limb, from mechanical diggers to laser-firing spaceship attachments. Iko was developed with Lego's experimental research division, called the Future Lab, and Cirec, a Colombian foundation for physical rehabilitation.

  Robotic competitions also grew around the platform. The FIRST LEGO League Challenge, open to students aged 9-16 in most countries, had 38,609 teams competing in the 2019-2020 season. The FIRST LEGO League Explore program for students aged 6-9 had 21,703 teams that same year.

• 7. Patents, Clones, and Legal Battles

  ›

  The last significant patent protecting the core Lego brick design expired in 1978. That opened the door for competitors to produce compatible blocks, and legal skirmishes followed for decades.

  In 2002, Lego sued the CoCo Toy Company in Beijing over its "Coko bricks" product for copyright infringement. A Chinese court ordered CoCo to stop manufacturing the product, publish a formal apology, and pay damages. Lego sued the British company Best-Lock Construction Toys in German courts in 2004 and again in 2009. In the second case, the Federal Patent Court of Germany ruled that Lego could not claim trademark protection over the shape of its bricks. In 2010, the European Court of Justice went further, ruling that the eight-peg design of the original Lego brick performs a technical function and therefore cannot be registered as a trademark.

  A 2005 lawsuit against Canadian company Ritvik Holdings, which makes Mega Bloks, went to the Supreme Court of Canada. The court upheld Ritvik's right to sell its product.

  In 2020 and 2021, Lego sent cease and desist letters to small toy retailers and popular YouTubers in Germany. A 2021 shipment from Chinese clone producer Qman was blocked by German customs over potential intellectual property concerns. The toy retailer receiving that shipment launched a public fundraising appeal to import the blocked bricks and donate them to children's homes. Within a couple of weeks, the campaign had raised more than its target.

  In 1997, more than five million Lego pieces were swept into the ocean when a wave struck a cargo ship off the coast of Cornwall, England. Pieces from that container have continued washing ashore in the decades since, drawing attention from beachcombers and researchers tracking ocean debris.