This paper presents a set of cubes for modular design that act as a meaningful trial for the democratization of design and manufacturing. Called CUBEMENT, the cubes are compatible with existing building platforms such as LEGO Technics, and physical computing components. CUBEMENT consists of a power supply and components for mechanism building that can support other cubes or extend to physical computing. CUBEMENT components can be connected and interlocked with one another by simply snapping together small magnets. The aim of CUBEMENT is to create a seed movement, expand the application of structural mechanisms further, and control that movement by embracing other platforms within its platform. Therefore, it will be able to simultaneously support the sketching of movement from mechanism building and physical computing. CUBEMENT also plays a role as a tangible communication medium for intangible mechanism movement.