Robotics in Education Database from HEART project
Link: Robotics in Education Database from HEART project: "A comprehensive resource with information about robotics resources"
The database contains information about a number of educational robots, a small description, their website and videos about their functionality. Based on a number of keywords you will be able to find the robot you are looking for and which may concern arduino based robots, 3d printed robots, robots suitable for STEM education, etc.