Traditional definition of architecture has been greatly extended nowadays. Because of the advancement of information and communication technologies and the demand for better living quality, people’s interests on smart environments is also increasing. Ubiquitous computing technologies for off-the-desktop interaction applications have been extensively studied for many years. While the mouse and the keyboard have emerged as the predominant input devices, user input in smart environments presents a different set of challenges. While an smart environment is operable by multiple users, numerous sets of devices and ambient events. Smart environment includes physical-digital interactive interfaces, sensing and perceptual technologies, application and service controls, and human and environmental adaptations. These issues make the design of smart environmental much more complex and difficult. Designers not only need to develop the concept, but also to learn programming and welding circuit. Those technique problems make learning interactive design of smart environment difficult and disturbing. According to the existing issues mentioned above, the motivation for this research is to challenge the question: How can we learn interactive design of interactive architecture just alter or enhance a function of a smart environment by manipulating interactive components with ease, if not effortless. The main goal of this research is to propose a physical rapid prototyping toolkit for interactive environments — Interactive Design Toolkit (IDT). The IDT is to support learning how to design and prototyping of the interactive system in a smart environment, using easy-to-assemble interactive objects as the building blocks. The toolkit is a set of objects and each object is a functional device with a number of I/O, sensors and parts, for instance, photocells, analog buttons, servo actuator etc. Each object performs minimal function and when objects are composed together they work as a system. The process of assembling objects is very similar to toy bricks and flow-controlled programming. This framework allows designers and researchers to easy learn the concept of electric elements inner those bricks and quickly prototype physical user interface and conduct experiments in a smart environment for different contexts.