What will tomorrow’s world be like? Our children are also grappling with this question. The Fridays for Future student demonstrations and their impact on politics and society show that climate activism is gaining importance worldwide. After all, our Earth is unique and irreplaceable. We cannot start early enough to make even the very young aware of this topic. Environmental awareness, sustainability and renewable energy can be explained in a child-appropriate manner through play. And toys made of various eco-friendly materials are not only fun to play with, but also kind to the environment at the same time.