Fold the entire model in half along the original diagonal center line (kite folds inside).
A 15x15 cm (6x6 inch) sheet is standard, but any size works. Optional: A pen to draw eyes on the finished mouse. Step-by-Step Folding Instructions mouse_instructions.7z
You now have a 3D origami mouse that can sit on its own. Other "Mouse" Options Fold the entire model in half along the
Fold the sharpest point in to make the nose, or leave it long to serve as the tail. mouse_instructions.7z
Fold the pointed top corner down to meet the center point of the bottom edges.