The plant-plastic used in this set is derived from sugarcane. Hape always endeavours to leave a better world behind for future generations. Use the included bamboo mold to create biodegradable paper vases for your seeds to grow in.  Keep your seeds warm and allow light to reach them through the transparent cover. Meanwhile, you can observe how plants grow and learn about their need for water, light and heat. When your plants are big enough, you can remove them with their paper vases and take them outside. The paper vases will be broken down by living things. Fully green and eco-friendly!  This wonderful, eco-friendly greenhouse playset is a fantastic way to start learning about nature and how to grow your own plants.