From this post you will learn how to get from this:
4 c Juice, such as apple or grape
4 Envelopes Knox Gelatine (each envelope holds 1 Tbs Knox Gelatine)
In medium saucepan heat 3 cups juice to boiling. Meanwhile, in large bowl, sprinkle Knox Unflavored gelatine over remaining 1 cup cold juice; let stand 1 minute. Add hot juice and stir until gelatine is completely dissolved, about 5 minutes. Pour into 8 or 9-inch baking dish; chill until firm, about 3 hours. Cut into 1-inch squares.
MICROWAVE DIRECTIONS: In 2-cup glass measure, sprinkle Gelatine over 1 cup cold juice; let stand 3 minutes. Microwave at high 1 minute 20 seconds; stir thoroughly. Let stand 2 minutes or until gelatine is completely dissolved. Pour int 8 or 9-inch baking dish; stir in remaining 3 cups juice. Chill as above. **Try using assorted cookie cutters to create fun shapes.
Kerry Lawrence told me about these made with fruit juice. She likes to make them for her grandkids because it uses fruit juice instead of sugary jello. (Although I think fruit juice also has a lot of sugar in it.) Sam requested that we make it today and we used Ocean Spray Light Cran-Grape juice.