Tear or cut scrap paper into small pieces (under 2 inches) and soak them in hot water for at least an hour, or overnight for firmer papers.

How to Make Paper with Kids: A step-by-step tutorial - TinkerLab

Combine a handful of soaked paper with 2-3 cups of water in a blender. Blend until smooth. Add more water if the consistency is too thick—it should look like thick smoothie or oatmeal.

you are trying to make (e.g., thick, thin, colored, textured)? If you have a mould/deckle frame already?

Used office paper, newspapers, or greeting cards. Blender: A kitchen blender or immersion blender. Water. Mould and Deckle: A screen-based frame to catch the pulp. Tub/Vat: A container large enough for the mold. Towels/Felts: For draining and drying the paper. Optional: Flower petals, spices, or thread for texture. Step-by-Step Instructions

Let the excess water drain. Place the frame screen-side down on a flat towel and use a sponge to press out excess water from the back.

Dunk the papermaking mould and deckle (the screen frame) into the vat and pull it up slowly, keeping it level to catch an even layer of pulp.