In a saucepan over medium-high heat, combine the grape jello ingredients: water, cane sugar, agar agar, and grape juice. Stir well, then bring the mixture to a boil. Cook the mixture at a rolling boil for 2 minutes--keeping a close eye on it to avoid boil-over!--then remove it from the heat and let cool until it stops steaming, about 3-5 minutes.
Equally divide the grape mixture between 4 dessert glasses. Carefully transfer them to your fridge and chill for about 1 hour, until almost set.
In another saucepan over medium-high heat, combine the apple jello ingredients: water, cane sugar, agar agar, and green apple juice. Stir well, then bring the mixture to a boil. Cook the mixture at a rolling boil for 2 minutes--again keeping a close eye on it to avoid boil-over!--then remove it from the heat and let cool until it stops steaming, about 3-5 minutes.
Equally divide the green apple mixture between the 4 dessert glasses, pouring it directly on top of the grape jello. Allow the jello to set for 1 hour.
Serve! I love to enjoy this jello nice and chilled, straight out of the fridge.