Computational thinking education using physical computing tool is one of the representative examples for educational amalgamation between science and software. However, the level of programming education is not easy for beginners. In addition, the characteristics of physical computing tools and learning environments at typical schools make the beginners difficult to approach and experience computational thinking educations. In this paper, we design a modularized learning tool that makes the block coding possible. Using this tool, the learners can concentrate on the programming for computational thinking regardless of specific learning environments. The research methods for designing the education tools are as follows. First, the definition of Computational Thinking and the education model of Computational Thinking, and the factors of Computational Thinking education should be determined. Second, by analyzing the Arduino - based physical computing tools – used in the education of Computational Thinking, the education tools designed in this study constitutes an element to be equipped in the education of Computational Thinking. As a result, we have designed 21 block coding modules, and one main module based on Arduino Uno.