What are the ingredients used in making jello shots? Which properties of liquids among #1 are important for good results? Is viscosity not included in #2?
Viscosity
Jello shots are a combination of alcohol and jello to create an edible intoxicant.  If the liquid for the Jello shots has too low a viscosity, it will not become a semi-solid. 
Resistance of a fluid to shear deformation
Is viscosity unimportant in making jello shots?