This article discusses the concept of "toolkits for user innovation," an approach that shifts the responsibility of understanding user needs from manufacturers to users. Traditionally, manufacturers first explore user needs and then develop products based on that understanding. However, this process is often costly, time-consuming, and difficult. In contrast, the toolkit approach allows users to take on the task of developing custom products and services, using tools provided by manufacturers. This method has been successfully applied in fields such as custom integrated circuit design, where it has significantly reduced development time and costs. The article explains that toolkits for user innovation are sets of "user-friendly" design tools that enable users to develop new product innovations for themselves. These toolkits are specific to the design challenges of a particular field or subfield, such as integrated circuit design or software product design. Within their fields of use, they give users real freedom to innovate, allowing them to develop producible custom products via iterative trial and error. The article also discusses the economic and technical factors that make toolkits for user innovation desirable. The "stickiness" of information—how costly it is to transfer information from its point of origin to a specified problem-solving site—plays a key role in determining the effectiveness of toolkits. When information is sticky, it is more expensive to transfer, and thus, toolkits can help reduce these costs by allowing users to access and use the information they need. The article highlights the benefits of using toolkits for user innovation, including the ability to perform trial-and-error learning, access a "solution space" that encompasses the designs users want to create, and use familiar design languages and skills. It also discusses the importance of translating user designs into a language that can be understood by the intended production system, ensuring that the final product meets the user's needs. The article concludes by discussing the relationship of toolkits to other product development methods, where toolkits will offer the most value, how toolkits can be developed, and the competitive value of toolkits for manufacturers. It emphasizes that toolkits can create competitive advantages for manufacturers that are first to offer them, as they can set standards for user design languages and potentially reduce costs and improve efficiency.This article discusses the concept of "toolkits for user innovation," an approach that shifts the responsibility of understanding user needs from manufacturers to users. Traditionally, manufacturers first explore user needs and then develop products based on that understanding. However, this process is often costly, time-consuming, and difficult. In contrast, the toolkit approach allows users to take on the task of developing custom products and services, using tools provided by manufacturers. This method has been successfully applied in fields such as custom integrated circuit design, where it has significantly reduced development time and costs. The article explains that toolkits for user innovation are sets of "user-friendly" design tools that enable users to develop new product innovations for themselves. These toolkits are specific to the design challenges of a particular field or subfield, such as integrated circuit design or software product design. Within their fields of use, they give users real freedom to innovate, allowing them to develop producible custom products via iterative trial and error. The article also discusses the economic and technical factors that make toolkits for user innovation desirable. The "stickiness" of information—how costly it is to transfer information from its point of origin to a specified problem-solving site—plays a key role in determining the effectiveness of toolkits. When information is sticky, it is more expensive to transfer, and thus, toolkits can help reduce these costs by allowing users to access and use the information they need. The article highlights the benefits of using toolkits for user innovation, including the ability to perform trial-and-error learning, access a "solution space" that encompasses the designs users want to create, and use familiar design languages and skills. It also discusses the importance of translating user designs into a language that can be understood by the intended production system, ensuring that the final product meets the user's needs. The article concludes by discussing the relationship of toolkits to other product development methods, where toolkits will offer the most value, how toolkits can be developed, and the competitive value of toolkits for manufacturers. It emphasizes that toolkits can create competitive advantages for manufacturers that are first to offer them, as they can set standards for user design languages and potentially reduce costs and improve efficiency.