Choose dry pasta that has an opening, such as macaroni, penne, rigatoni, manicotti or wheels.
Add 10 drops of a single color of food coloring into a disposable plastic container, such as a clean yogurt cup. Stir in 1 tsp. of rubbing alcohol in the food coloring.
Drop in a 1/2 cup of dry pasta and shake the container to cover the pasta with color; use a spoon to stir the pasta if necessary. Remove the colored pasta with a slotted spoon and drain off any excess liquid. Place the colored pasta in a single layer on a stack of three to four paper towels to absorb the excess dye.
Put each color you want to use in separate containers so the colors do not mix.
Add designs to the surface of pasta by writing on the pasta with a clear wax crayon. Decorate the pasta with geometric shapes or abstract marks and then shake the pasta around in a food coloring container. The wax will not absorb the color, so the design is seen through the dye.