My Master Slime List

To support my GoFundMe Summer of Science Campaign I am sharing my Mad Science Master Slime Making Recipe List. These are all my recipes for slime, putty, oobleck and more. I’ve collected and perfected these recipes over the last 10 years, so I hope they give you some inspiration to make and perfect your own concoctions. Enjoy!

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With all slime recipes, either wear gloves or wash hands thoroughly after each experiment. You may want to consider goggles to protect your eyes from splashes. Children should be supervised with making slime of any kind. Most recipes can be stored for weeks in a plastic bag or airtight container. Wash your hands after playing with your slime. Unless specifically marked as edible, do not place slime in or near your mouth. Several of these slimes may stain clothing or damage upholstery or carpet, so be careful where you mix up a batch.

You can add colorants – food dye, acrylic paint, glow-in-the-dark paint, water color paints, Kool Aid – to most of these recipes before you cause the chemical reaction and start polymerization. Other additives, like glitter or sequins, are also great. For magnetic slime, I suggest using at least 1 tablespoon of black iron oxide with the Borax Slime recipe. A neodymium magnet (available at hardware stores) will pull on the slime for fun effects.

Why does it work? Many of these recipes rely on the element boron to make them work. Glue is mostly made up of a chemical called polyvinyl alcohol, or PVA. This PVA is a polymer, basically a long chain of molecules (think of spaghetti or a necklace). When you add boron (an active ingredient in Borax, boric acid, contact solution and some liquid starches) to the PVA, some spots on the long chains start to stick to each other, instead of sliding over each other. We call this cross-linking. Soon the liquid glue becomes a rubbery solid, which we call an elastomer. This process is called polymerization, and we use it every day to make plastics and other products.

Liquid Starch Slime
1/2 Cup of Elmer’s Washable Non Toxic Clear Glue or White Glue
1/2 Cup of Liquid Starch (we recommend Sta‑Flo for best results)
1/2 Cup of Water

Add water to glue. Mix well. Add liquid starch. Mix well.

Borax Slime
1 tsp. Borax powder
1/2 Cup of Elmer’s Washable Non Toxic Clear Glue or White Glue
1 ½ cup water

Dissolve 1 teaspoon of borax powder into 1 cup of water. Combine 1/2 cup of glue and mix with 1/2 cup of water until well mixed. Pour borax/water mixture into glue/water mixture. Mix well. Vary the amount of Borax you use to make thicker or thinner slime. With additional Borax it is easy to make putty. This is a great slime to experiment with.

“Rubber” Balls
2 tablespoons warm water
1/2 teaspoon Borax
1 tablespoon of white glue
1 tablespoon of cornstarch

Mix the Borax into the water until all the crystals are dissolved. In a separate bowl, mix together the cornstarch and white glue. Add 1 teaspoon of the Borax solution the glue mixture and wait 5 minutes. Then start stirring. Once the mixture comes together as a sticky clump, you can take it into your hands, rolling it until you get a ball. Adjust the amount of Borax or cornstarch until you get a ball that bounces the way you like best.

Eyedrop Slime
1/2 cup of glue
¾ tsp baking soda
Add 40-50 drops of eye drops/contact solution*

Add baking soda to glue. Mix well. Add eye drops 10 at a time, mixing with each addition.

*Any solution that contains the active ingredient boric acid will work.

Fluffy Slime
1 can shaving cream
1/2 Cup of Elmer’s Washable Non Toxic Clear Glue or White Glue
1 tablespoon (or more) eye drops/contact solution*

Measure 3-4 cups of shaving cream into a bowl. Add a 1/2 cup of glue to the shaving cream and mix thoroughly. Add 1 tablespoon of the saline solution to the mixture and start whipping until combined.

*Any solution that contains the active ingredient boric acid will work.

Fake Snot
3 packets unflavored gelatin
1/2 cup of boiling water
1/2 cup corn syrup

Mix gelatin into boiling water, adding a little at a time and stirring after each addition. Let stand 5 minutes. Mix in corn syrup. This slime is edible, but not really tasty.

Fiber Slime
3 tsp fiber supplement powder (the main ingredient needs to be psyllium husk)
3 cups of water

Combine ingredients. Boil 3-5 minutes. Let cool. This slime is edible, but not really tasty.

Oobleck
1 box of cornstarch
1 cup of water

Place cornstarch in a bowl. Slowly add water, stirring frequently. You may not use all of the water. When it becomes hard to stir the Oobleck, check to see if you have achieved Non-Newtonian Fluid status. (Can you make a ball of Oobleck while squeezing that quickly falls apart into drizzling liquid when you stop squeezing?) This slime is edible, but not really tasty.

Milk Plastic
1 cup of milk
4 teaspoons of white vinegar

Heat milk until it’s hot, but not boiling. Add vinegar and stir for a minute. Strain. Rinse curdles. Knead curdles together to make milk plastic. This slime is edible, but not really tasty.

Homemade Play Dough
1 cup of flour
¼ cup salt
1 tbsp. cream of tartar
1 tbsp. vegetable oil

Mix the flour, salt, cream of tartar, and oil in a large mixing bowl. Bring ¾ cup of water to boil. Add water to the bowl and stir continuously until it becomes a sticky, combined dough. Allow the dough to cool down then take it out of the bowl and knead it vigorously for a couple of minutes until all of the stickiness has gone. This is the most important part of the process, so keep at it until it’a perfect consistency! If it remains a little sticky then add a touch more flour until just right.

Did you know that play dough conducts electricity? It does! Learn to make your own Squishy Circuits using Play Dough!

Exploding Snow
1 can shaving cream
¼ cup baking soda
¼ cup vinegar

Spray about a cup of shaving cream into a bowl. Sprinkle baking soda over the shaving cream a tablespoon at a time, mixing each time. When you reach a fluffy consistency that can be made into a ball, you have snow! When you are done playing with that, add vinegar for a foamy finish.
Soap Slime
1 bar of Ivory soap
Water

Place the bar of soap on a microwave safe plate or bowl. Put in the microwave. Cook on high for 2 minutes. Keep an eye on it, making sure it doesn’t overcook. Let cool and play. When you’re done with the fluff, slowly add water a little at a time, until you have a runny, foamy slime.

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