Peel and cut off ends of zucchini. Quarter length wise and remove seeds and soft centers with a spoon. Cut into half inch pieces.
Combine 2 cups sugar, water and kool-ade in a medium pot. Cook over high heat until mixture comes to a boil and sugar disolves. Reduce heat to medium low and add zucchini.
Simmer until zucchini is tender, 15-20 minutes.
Set a strainer over a large bowl and drain zucchini. Allow to drain and cool for 30 minutes. Reserve liquid for making more candy later.
Place zucchini pieces in a food dehydrator for about 8 hours or until mostly dry but still slightly sticky (Alternately you could place pieces on a cooling rack over a cookie sheet and put in the oven set to the lowest temperature with the door craked slightly).
Roll pieces in granulated sugar and let cool completely.