The water moves up the paper because capillary action is stronger than gravity.
Capillary action depends on cohesion and adhesion.
Cohesion is the mutual attraction of water molecules. Adhesion is the attraction of water molecules to other kinds of molecules, in this case the paper. Each bag should contain a sample of lipstick, hair, a fingerprint, and a pen. Each item and the bag they go in should all be numbered the same. Make up a ransom note with the pen that you want to belong to the criminal.