Most bottles of school glue are about 5 ounces (150 mL). Keep this in mind, as this will affect how much liquid starch you use. You can make a smaller batch of slime using just 1 bottle of glue. You’ll use less liquid starch as a result. If you are using clear school glue, remember: you can always add glitter to it later!

If you are using glittery school glue, you probably already have enough glitter. If you want your slime to be more colorful, add 8 to 12 drops of food coloring. This is enough for 2 bottles of glue. [3] X Research source

Baking extract: 2 to 4 teaspoons. This is your basic almond, lemon, mint, or vanilla extract. You can get it in the baking section of a grocery store. [4] X Research source Candy-making flavoring oil: 2 vials. You can buy this in the candy-making section of a craft store. It comes packs of 2 tiny bottles. You will need to use both tiny bottles. Essential oil: 8 drops. Buy it in a health food store or in the soap-making section of a craft store. Vanilla, lemon, mint, and lavender are great choices. [5] X Research source Fragrance oil: 1/2 teaspoon. This is similar to essential oil, but less potent. Make sure that it is skin-safe. Soap-making fragrance oils will be the best.

Don’t use more than 10 ounces (300 mL) of liquid starch altogether. If you used a different amount of glue, use half of what you used for the glue. For example, if you used 5 ounces (150 mL) of glue, use 2. 5 ounces (75 mL) of liquid starch.

As you knead the slime, it will take on a more putty-like consistency. Make sure that your hands are clean and dry for this.

Slime will start to dry out as it gets old. If it becomes too hard to play with and loses its stretch and ooze, it’s time to toss it.

You will be kneading the slime in the bowl, so make sure that it’s big enough for your hands.

You don’t need to add food coloring into glitter school glue because it already has color in it.

During this time, the ingredients will come together and start to polymerize.

There may still be some Borax water left in the bowl, which is fine. The glue will have picked up everything it needed in order to turn into slime.

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Slime hardens the older it gets, so when your slime starts to lose its stretch, toss it.