Robo-Wonderers is a project that implements the action STEM by the Greek National Support Service of eTwinning. The aim of this project is to introduce Educational Robotics with the fascinating learning of physics, technology, mathematics and engineering (STEM) in practice, without theories and unnecessary terminology, via analysis and problem-solving methods. At the same time, it is possible to develop skills of ingenuity, algorithmic and programming models and team spirit demonstration.