Add 1/2 cup 3-6 cups penne pasta, 1 teaspoon6 teaspoons rubbing alcohol, and a few drops of food coloring to a zip-top gallon food storage freezer bag.
Seal bag and shake until pasta is thoroughly coated.
Spread dyed pasta out onto a sheet pan and allow to dry overnight or until completely dry.
Repeat for each color of the rainbow. (To re-use the same bag, just rinse it out in between colors.
To Make Rainbow Mobile Craft:
Cut 1 heavy-duty paper plate in half.
Use a single hole punch to punch 1 hole in the center of the rounded edge of one plate half, then punch 6 evenly-spaced holes along the straight edge.
Use washable school glue to glue cotton balls onto one side of the paper plate half, leaving holes uncovered.
While glue is drying, thread dyed penne pasta onto string Consider threading one string of each color of the rainbow. Or, allow children to be creative and choose colors.
Tie strings of rainbow pasta onto the holes along the straight edge of the plate half.
Tie a loop of string onto the hole in the curved edge of the plate half for hanging.