Once the cardboard is soft, use your hands to mash and mix the pieces into a pulp.
Drain any excess water through a fine mesh strainer or cheesecloth, squeezing out as much water as possible.
Shape the pulp into your desired form, such as a bowl or planter, and let it dry completely for 24-48 hours.
For a colorful variation, add a few drops of food coloring to the water mixture before soaking the cardboard. You can also incorporate other natural fibers, such as shredded paper or sawdust, to add different textures. Experiment with different shapes and sizes for your creations, and consider using a silicone mold for more intricate designs. For a fragrant touch, add a few drops of essential oils during the mixing process.