This paper introduces an open-source 3D printed low-cost legged robot environment designed for educational purposes. The platform, called Metabot, is already operational and is currently experienced by teachers and pupils. The robot as a teaching aid, has several advantages: at first, it is stimulating for pupils, especially legged robots. Second, robotics is multidisciplinary and centralizes a broad spectrum of knowledge for the pupils, in particular, it allows to introduce programming in a concrete environment, which is now an important need in school. Finally, legged robots can illustrate concretely several matters of geometry.