This work presents the circular business model of BAMBU, an initiative that combines a digital platform with a physical store dedicated to the reuse of second-hand children's items. BAMBU stands out by offering a reliable and customer-centric experience, facilitating both the purchase and sale of products in a secure manner. Its approach not only generates income for families but also reduces environmental impact, directly contributing to the Sustainable Development Goals (SDGs), specifically SDG 12 (responsible consumption and production) and SDG 8 (decent work and economic growth). The validation of the proposal with users has yielded positive results, with a high level of acceptance and willingness to pay for the service. Additionally, the technical and operational feasibility of the business model has been confirmed. Financially, BAMBU proves to be viable, with a Social Net Present V...