Education of students in science, technology, engineering, art and math (STEAM) has received increasing attention over past years with calls both for greater emphasis on these areas and for improvements in the quality of curriculum. Robotics and progranmiing is the most attractive fields in STEAM programs. Education robots are an ideal tool for introducing programming and thinking complex to children at early ages. While learning robot programming techniques, understanding sensor structures and their values can be difficult. This paper presents a mobile system to show real-time sensor values to children clearly.