Drag the magnetic wand across the face. Tiny iron filings cling to the wand and form whiskers, eyebrows, hair, and beards on the bald cartoon man. Tap Shake to start over with a fresh pile.
This simulation uses soft inverse-square magnetic attraction with physical adhesion — filings stuck to the wand actually move WITH it, just like real iron filings clinging to a magnet. Open Settings to tune the magnet's strength, range, friction, and seven other physics constants.