DIY, tinkering, hacking, handcrafts, open-source hardware and software, and other amateur making pastimes represent a family of creative activities in which people use, repurpose, and modify existing materials to produce something meaningful. The techniques involved are often documented and shared so that others can reproduce, reinterpret, or extend them. This community is a growing source of innovation, combining novel technologies with traditional crafting methods, (re)appropriating tools and materials, engaging with their communities, and redefining the consumer relationship. These DIY practices support the growth of identity, community, expertise, and education, and provide us with an opportunity to understand, critique and imagine the futures of design, culture, politics, scientific research, sustainability, production, consumption, and technological innovation.