In a small saucepan, stir together the water and agar-agar flakes, and place over medium heat. Bring the mixture to a boil, reduce heat to low, and cook while stirring constantly for 5-10 minutes or until the agar-agar is thoroughly dissolved. Place the grape juice in a glass bowl, add the agar-agar mixture, and whisk well to combine. Place in the refrigerator, chill for 30 minutes or until partially set; gently fold in the grapes, and chill for several additional hours or until totally gelled. Serve in small individual glass dishes, or transfer to small individual airtight containers for transport.

*Variation - try substituting other types of fruit juice or sliced fruit, such as berries, cherries, apples, or pears. Citrus fruits and pineapple sometimes react differently with the agar-agar so trying mixing them with other types of fruit for proper gelling.

Serves 4-6