How to Make Rock Candy

Making rock candy - which is actually just sugar crystals on a string - can be a remarkably enjoyable and edible science project, as well as a tasty treat. Follow these simple steps to have a batch ready in no time.

Things You'll Need

  • pencils
  • 1 cup water
  • 2 cups sugars
  • paper and binder clips
  • food coloring
  • 1 quart jars or glass
  • cotton strings
  • ice cream sticks
  • Food Coloring
  • Ice Cream Sticks
  • 1 Quart Jars Or Glass
  • Pencils
  • Paper And Binder Clips
  • Cotton Strings

Instructions

  1. Sterilize the glass jar and paper clip by boiling both in water for a few minutes.

  2. Tie a short piece of kitchen string to the middle of a pencil or Popsicle stick.

  3. Attach the paper clip to the end of string. (The clip will weigh the string down - this is important later.)

  4. Moisten string lightly and roll in sugar (this helps the crystals form on the string).

  5. Place the pencil or stick over top of a jar. Make sure clip is in the bottom of jar and the string hangs straight down into jar.

  6. Heat 1 cup water to boil.

  7. Dissolve 2 cups sugar in boiling water.

  8. Add a few drops food coloring if you like.

  9. Pour sugar syrup into jar and leave for 2 to 3 days or until crystals form on the string.