How to Make Gak out of Liquid Starch

By Mary Ylisela ; Updated September 15, 2017

Things Needed

  • Bowl
  • 1 cup white school glue
  • 1 cup liquid starch
  • Wooden spoon
  • Plastic zip bag

Gak is similar in consistency to a thick slime. It's messy to make and play with but completely safe for children and good science activity, as well. Gak changes consistency as it's manipulated, becoming thicker when you handle it and more liquid when set down. The substance will stick to tables, floors or walls and peel right off. Gak can be made at home or in the classroom with liquid starch and other simple ingredients.

School glue helps make your gak.

Pour 1 cup white school glue into a mixing bowl.

Add the liquid starch, 1/4 cup at a time. Stir each 1/4 cup in thoroughly before adding the next, until you've added the entire cup.

Drizzle in extra liquid starch if the gak feels sticky instead of rubbery and smooth. Stir the extra starch in with your wooden spoon.

Tip

Color your gak with a few drops of food coloring or Kool-Aid powder. Keep in mind that adding either can cause color transfer to your hands and other surfaces.

Add fragrance to your gak with a couple drops of your favorite essential oil.

Press gak into a newspaper to transfer the ink to your gak.

Store gak in a plastic zip bag, kept in a cool place, for up to a week.

About the Author

Mary Ylisela is a former teacher with a Bachelor of Arts in elementary education and mathematics. She has been a writer since 1996, specializing in business, fitness and education. Prior to teaching, Ylisela worked as a certified fitness instructor and a small-business owner.