Grow Your Own Toy is a sustainable play system that reimagines toys as living, growing experiences. Using mycelium and hemp grown in reusable molds, the project creates biodegradable building blocks that children can grow, assemble, and compost themselves. Rooted in circular design, the system fosters environmental responsibility, material awareness, and creativity through hands-on play. It offers a meaningful alternative to plastic toys that often end up in landfills. Children engage with every stage of the material’s life cycle, and as they grow older, the blocks can be repurposed into functional items like acoustic panels or comfort spaces. Blending bio-fabrication and imaginative play, Grow Your Own Toy brings nature into daily life through tactile, regenerative design.