PLUMBUM IMAGINARIUM – Pencil packaging. The box was designed to be produced in recycled cardboard and printed in two colors. Inside the box there’s a sandpaper to sharpen a pencil, increasing its longevity. This was a proposal for merchandising of Treetop walk – Serralves museum – 2021. The Serralves Foundation, in collaboration with the Portuguese State Environmental Fund, promotes the construction of a “Treetop Walkway” in Serralves Park. Identified as being strategically relevant, the new walkway is created next to the tree canopy, high above the ground, and offers breathtaking opportunities to observe and study the Biodiversity of Serralves Park.