Prepare jello according to package directions. Pour into shallow pan and chill until firm, about 3 hours.
Using a dull knife, make as many cuts as possible across the length and width, forming tiny cubes.
With an adult's help, grind ice cubes in a blender.
Spoon alternating layers of crushed ice and gelatin pieces into tall glasses, filling them about 2" away from tops. Slowly pour soda into each glass until full, then stir gently. Serve retch with ice tea spoons, so your guests can get at every chilly glob.
Sicko serving suggestion: Almost any cooked food can look like puke if you grind it for a few seconds in a blender. And it makes for a tasty sandwich spread!