Measure out 1 cup of water in a liquid measuring cup, then sprinkle on the 1/4 cup gelatin and stir very thoroughly.
Try to get as many gelatin lumps out as possible. Allow the water/gelatin mixture to sit while you heat up the orange juice.
In a small-medium sized pot, heat up the 2 cups of orange juice over medium heat until warm to the touch, stirring occasionally.
Pull from heat, and whisk in Camu powder until completely dissolved.
Pour the water/gelatin mixture into the warm orange juice, and stir until the mixture is smooth and the gelatin is dissolved.
Pour into 1/4 sheet stainless steel cookie sheet (or you can also pour the mixture into an 8x8 baking dish, or a couple smaller glass dishes. )
Place your dish in the refrigerator, and allow the mixture to cool for at least 2 hours for best results, or until firm enough to cut.
Once firm, use a butter knife to loosen up the gummy mixture from the edges of the baking dish, then slice the gummies into your preferred size. Store an enclosed container in a dry place.