ADD 1 cup boiling water to each flavor fruit gelatin mix in separate bowls. Stir at least 2 minute until completely dissolved. Pour each flavor of gelatin into separate small shallow food storage container sprayed with cooking spray. Refrigerate 2 hours or until firm.
SPRINKLE unflavored gelatine over cold water; let stand 1 minute Stir in 1-1/2 cups boiling water. Add condensed milk; mix well. Cool slightly.
CUT flavored gelatin into cubes. Randomly place cubes in 13x9-inch pan sprayed with cooking spray. Pour milk mixture over cubes. Stir very gently, if necessary to distribute gelatin cubes. Refrigerate 2 hours or until firm.