Teaching MDE is challenging, not least because the tools developed by the community can be difficult to install and configure as well as complex to master and use. To reduce the complexity for learners of MDE, enabling them to focus on the core MDE concepts, we present the MDENet Education Platform – an online, playground-based platform for learning MDE without the need for tool installation. Teachers declaratively describe learning activities, carefully controlling the complexity of the user interface learners are exposed to. We give an overview of the platform and highlight some current applications. The demonstration will show the use of the platform from the perspective of learners and teachers.