Roll up the hair into a hot dog shape and smear more on the outside. Let it dry. Take it to school for show and tell. You Can dip it in warm water to freshen it up. That's like the gelatin and syrup.
Stomachs are full of acids, like the vinegar.
The reason hairballs look so gross is that they are full of this thick goop from inside the cat's digestive system. Your stomach makes the same kind of goop - mucus. You Can see both the small undercoat hairs and the longer overcoat hairs in this electron microscope picture of a real hairball coughed up by Beakman's cat, Algebra. One of the nicest things You Can do you for a cat is to brush its fur. You'll remove the fur that might get into its stomach or throat.