Break the almond paste into small pieces over a medium bowl. Add 1 cup of the confectioners' sugar, and work it in with your hands until incorporated. It will be crumbly. Add another 3/4 cup of sugar, and work it in really well. Pour in the corn syrup, and work it in until evenly blended. Spread remaining sugar out on a clean work surface, and knead the dough until smooth and uniform, 3 to 5 minutes. If the dough seems too sticky, knead in more sugar. Wrap the dough in plastic wrap, and refrigerate for about an hour. It should have the consistency of modeling dough.
Break off small pieces of marzipan to color, kneading in color thoroughly until you arrive at the desired color. Then blend the colored pieces into larger portions of dough. Dust a work surface and rolling pin with confectioners' sugar, and roll dough out to 1/4 inch thickness. Cut into desired shapes using small cookie cutters to make candies.
