Looking for how to make slime at home with simple ingredients and clear instructions? Below are several tried‑and‑true slime recipes, including classic stretchy slime, no‑borax slime, and edible slime options. You’ll also find safety tips, storage advice, and the basic science of slime.

What You Need to Know Before Making Slime

  • Adult supervision is strongly recommended, especially with young children.
  • Many popular slime recipes use PVA glue (white school glue) and a borate-based activator such as borax (sodium borate) or boric acid/borate salts found in some contact lens solutions.
  • Some people have skin sensitivities to borax or detergents; limit contact and wash hands well after play.
  • Do not eat standard slime. If you want something that’s safe to taste, use one of the edible slime recipes below.

Basic Ingredients for Homemade Slime

Most slime recipes fall into a similar pattern:

  • Polymer base: usually PVA glue (white school glue or clear glue).
  • Activator: something that contains borate ions (like borax powder, certain laundry detergents, or contact lens solution with boric acid + sodium borate).
  • Optional add‑ins:
    • Food coloring or liquid watercolors
    • Glitter, confetti, foam beads
    • Shaving cream (for fluffy slime)
    • Lotion or baby oil (for extra stretch)
    • Baking soda (to adjust thickness)

Recipe 1: Classic Borax Slime (Stretchy and Glossy)

This is the classic school glue + borax slime that most tutorials online use.

Ingredients

  • 1 cup (240 ml) white school glue (PVA glue)
  • 1 cup (240 ml) warm water (for the glue mixture)
  • 1 cup (240 ml) warm water (for the borax solution)
  • 1 teaspoon borax powder (sodium borate)
  • Food coloring or glitter (optional)
  • Bowl, spoon or spatula
  • Measuring cups and spoons
  • Airtight container for storage

Instructions

  1. Prepare the glue mixture

    • In a bowl, mix 1 cup glue with 1 cup warm water.
    • Stir until smooth.
    • Add a few drops of food coloring or some glitter and mix well.

  2. Prepare the borax activator

    • In a separate container, mix 1 teaspoon borax powder with 1 cup warm water.
    • Stir until most of the borax is dissolved (some undissolved grains are okay; avoid pouring them in).

  3. Combine and activate

    • Slowly add the borax solution to the glue mixture, 1 tablespoon at a time, stirring constantly.
    • The slime will start to form almost immediately.
    • Keep adding activator little by little until the slime pulls away from the sides of the bowl and is no longer overly sticky.

  4. Knead the slime

    • Remove the slime from the bowl and knead it with clean hands for 2–3 minutes.
    • If it’s still too sticky, add a few more drops of borax solution and keep kneading.

  5. Store it properly

    • Place slime in an airtight container or zip bag.
    • Store at room temperature; discard if it smells bad, grows mold, or changes color strangely.

Recipe 2: Contact Lens Solution Slime (No Loose Borax Powder)

This method is popular because it does not use dry borax powder, even though it still relies on borate chemistry inside the contact solution.

Ingredients

  • 1/2 cup (120 ml) white or clear PVA glue
  • 1/2 cup (120 ml) water (optional; omit for thicker slime)
  • 1/2–1 teaspoon baking soda
  • 1–2 tablespoons contact lens solution that contains boric acid and sodium borate (check the label)
  • Food coloring and/or glitter (optional)
  • Bowl and spoon

Instructions

  1. Mix glue (and water)

    • Add 1/2 cup glue to a bowl.
    • For a slightly stretchier texture, mix in 1/2 cup water; for thicker slime, skip the water.
    • Stir until smooth.

  2. Add color and baking soda

    • Add food coloring or glitter as desired.
    • Stir in 1/2–1 teaspoon baking soda. More baking soda makes the slime thicker and less sticky.

  3. Activate with contact solution

    • Add 1 tablespoon contact lens solution and stir.
    • Add more solution a few drops at a time, mixing well until the slime pulls away from the sides of the bowl and clumps together.

  4. Knead until smooth

    • Take the slime out and knead for a few minutes.
    • If it’s still very sticky after kneading, add a tiny bit more contact solution (too much can make it rubbery).

Recipe 3: Fluffy Slime with Shaving Cream

Fluffy slime is soft, puffy, and fun to squish. It doesn’t last as long as classic slime, but the texture is great for sensory play.

Ingredients

  • 1/2 cup (120 ml) white school glue
  • 2–3 cups foaming shaving cream (not gel)
  • 1/2 teaspoon baking soda
  • 1–2 tablespoons contact lens solution (with boric acid/sodium borate)
  • Food coloring (optional)
  • Bowl and spoon

Instructions

  1. Combine glue and shaving cream

    • In a large bowl, mix 1/2 cup glue with 2–3 cups shaving cream.
    • Stir gently until just combined; too much stirring can deflate it.

  2. Add color and baking soda

    • Add food coloring and mix.
    • Stir in 1/2 teaspoon baking soda.

  3. Add contact lens solution

    • Add 1 tablespoon contact solution and stir.
    • Add a little more, if necessary, until the slime starts forming and pulls away from the bowl.

  4. Knead gently

    • Knead the slime lightly; it should feel fluffy and airy.
    • Because shaving cream dries out, fluffy slime usually only lasts 1–2 days.

Recipe 4: Simple Cornstarch Slime (Oobleck, Non‑Sticky and Biodegradable)

If you want something borax‑free and more science‑experiment‑style, try oobleck, a classic non‑Newtonian fluid. It’s messy but made from food ingredients.

Note: This behaves differently from “stretchy” slime—it's liquid when you pour it and solid when you squeeze it.

Ingredients

  • 1–2 cups cornstarch (cornflour)
  • About 1 cup water
  • Food coloring (optional)
  • Large bowl or tray

Instructions

  1. Start with cornstarch

    • Add 1 cup cornstarch to a bowl.

  2. Add water gradually

    • Slowly pour in water while mixing with your hands or a spoon.
    • Aim for about 1 part water to 1.5–2 parts cornstarch.
    • Stop adding water when the mixture:
      • Feels solid if you punch or squeeze it quickly
      • Flows like a liquid if you let it sit or pour it slowly

  3. Adjust the consistency

    • Too runny? Add more cornstarch.
    • Too dry? Add a little more water.

  4. Clean up

    • Let oobleck dry, then scrape or vacuum the powder.
    • Don’t pour large amounts down the drain; throw it in the trash.

Recipe 5: Edible Marshmallow Slime (Kid‑Friendly and Tasty)

For very young kids who still mouth everything, try an edible slime. Textures are different from glue‑based slime but safer if accidentally tasted. Always check for allergies.

Ingredients

  • 1 cup mini marshmallows
  • 2–3 tablespoons cornstarch or powdered sugar (plus extra)
  • 1 teaspoon vegetable oil or coconut oil
  • Food coloring (optional)
  • Microwave‑safe bowl and spoon

Instructions

  1. Melt the marshmallows

    • Place 1 cup mini marshmallows in a microwave‑safe bowl.
    • Add 1 teaspoon oil.
    • Microwave for 20–30 seconds, until marshmallows puff and soften.
    • Carefully remove and stir.

  2. Add coloring

    • Mix in a few drops of food coloring (optional).

  3. Add cornstarch or powdered sugar

    • Stir in 2 tablespoons cornstarch or powdered sugar.
    • When it’s too thick to stir, dust your hands and the slime with more cornstarch/sugar and knead.

  4. Adjust texture

    • Too sticky? Add a little more cornstarch/sugar.
    • Too stiff? Massage in a few drops of oil.

Use edible slimes the same day, and throw away leftovers.

How to Make Slime Less Sticky or Less Hard

If your slime is too sticky

  • Knead longer first; warmth and handling often fix mild stickiness.
  • For borax/contact solution slime, add a few drops more activator, knead well, and repeat only if needed.
  • Lightly oil your hands (tiny amount of lotion or baby oil) when playing.

If your slime is too hard or rubbery

  • You likely added too much activator.
  • Gently massage in a small amount of:
    • Warm water, or
    • Unscented lotion or a few drops of baby oil
  • Seal in a container for 10–15 minutes, then knead again.

Safety Tips for Making Slime at Home

  • Do not eat standard slime that uses glue, borax, detergents, or contact lens solution.
  • Keep borax powder and activator solutions away from eyes and mouth.
  • Avoid slime if you have open cuts, eczema, or known sensitivities on your hands.
  • Always wash hands before and after playing.
  • If any ingredient gets in the eyes, rinse with plenty of clean water and seek medical advice if irritation continues.
  • Store slime out of reach of small children and pets.

How to Store and Clean Up Slime

  • Store slime in a sealed container or zipper bag at room temperature.
  • Most glue‑based slimes last about 1 week if kept clean and sealed.
  • Throw slime away if it:
    • Smells bad
    • Shows mold or dark spots
    • Changes color unexpectedly

Cleaning slime from surfaces

  • On hard surfaces:
    • Scrape off extra slime, then wipe with warm, soapy water.
  • On fabric or carpet:
    • Remove as much slime as possible.
    • Soak with white vinegar or rubbing alcohol, then gently scrub and wash as usual.
    • Test any cleaner on a small area first.

The Basic Science Behind Slime (Simple Explanation)

Most “glue + activator” slime is an example of polymer chemistry:

  • PVA glue contains long, chain‑like molecules called polymers.
  • Borate ions (from borax or boric acid in contact solution) link these long chains together.
  • This process, called cross‑linking, turns the liquid glue into a thicker, stretchy material: slime.

Cornstarch slime (oobleck) is a non‑Newtonian fluid:

  • When you apply force quickly (like squeezing or hitting), the starch particles lock together, making it feel solid.
  • When you move slowly, water flows between particles, and it behaves like a liquid.

These projects are a fun way to introduce basic chemistry and physics concepts during play.

Frequently Asked Questions About Homemade Slime

1. Can I make slime without borax?
Yes. Try:

  • Contact lens solution + baking soda (still uses borate, but no loose powder)
  • Laundry detergent slime (check labels and test for skin sensitivity)
  • Cornstarch oobleck (totally borax‑free)
  • Edible slimes (marshmallows, gelatin, or pudding mix)

2. Why is my slime not forming?
Common issues:

  • Your glue isn’t PVA-based (some craft glues don’t work).
  • Your contact lens solution doesn’t contain boric acid or sodium borate.
  • Not enough activator: add a little more, slowly, while stirring and kneading.

3. Is borax slime safe?
Used correctly and with supervision, typical slime recipes are generally considered safe for short‑term skin contact for most people. However:

  • Borax can be irritating; avoid ingestion and prolonged exposure.
  • People with sensitive skin or allergies should avoid borax‑based recipes and use edible or cornstarch slimes instead.
  • Always follow safety advice from health authorities and discontinue use if irritation occurs.

References

  1. Slime (material) – Wikipedia
  2. Non-Newtonian fluid – Wikipedia
  3. Polyvinyl alcohol – Wikipedia
  4. Borax – Wikipedia
  5. American Chemical Society – Exploring Polymers with Slime
  6. Royal Society of Chemistry – Slime Polymer Experiment
  7. Cornstarch and water (oobleck) – Science World Resources