Creator, a DIY modular ballpoint pen, requires users to assemble parts into a pen by themselves, which brings more interests and sense of accomplishment to users. It has a hollow metal hexagonal pen body, and the screws, springs and other parts of it can be clearly seen, which shows the mechanical aesthetics. The production process is reduced by more than 70%. Except refills and springs, most parts are completed by only one process, and the materials can be recycled 100%, which reduce energy consumption and resource waste.