Learning how to make slime was on my 2018 science to-do list. I decided that St. Patty’s day was the best time to create a Leprechaun slime recipe, one that could delight my girls and also feel a little mischevious as slime isn’t something we handle every day.
If your kids are always inquiring why, and how, check out our science of slime post to learn why slime behaves the way it does! And now…
This choice might be made for you depending on what kinds of ingredients you want to let your kids handle. Our first leprechaun slime recipe uses Borax, a detergent that some people use for laundry or dishes. Thus if you have young hands that like to experiment by putting things in their mouths, a different slime recipe that only uses kitchen ingredients (milk, vinegar, and baking soda) would be better. See our note on Borax to learn more.
We are going to learn how to make slime in four different ways. I’ve linked each slime type to their slime recipe below so you can easily navigate to what works best for you.
You can take a quick skim on the ingredients and instructions for each of the types of slime to determine which type best fits your family.
Simple slime isn’t the simplest of our slime recipes (Oobleck wins that prize), but it does pack the most bang for the buck. This slime is nice and thick and perfectly pullable! Using “parts” instead of measurements makes it a bit easier for kids – equal parts lets kids think about the volume they see in the bowl and eyeball it instead of getting bogged down in exact measurements. The nice thing about slime is that it will work great without perfect measurements!
This slime uses a bit more chemistry as you have to cook the solution of PVA from a powder. Nevertheless, this is a clear slime that really resembles what you can find in the stores.
This is a slime that I wouldn’t reccomend storing, so make it the day you plan to play with it. I love that this slime has only 3 common household ingredients, but it doesn’t stack up to some of the more robust slimes we have in this series. Perfect for little hands that might be tempted to put things in their mouths.
Milk Slime Ingredients:
Milk (lowfat works best)
Filter (like a coffee filter)
Fluffy slime is a light, airy, version of our Borax-Glue simple slime. When you’ve made this one there will be lots of little air bubbles inside the slime, which can cause a lot of silly popping and farting sounds as kids play with it. It will reduce down to regular borax-glue slime as time goes on, although it will retain the nice smell from the shaving cream.
Cornstarch slime, or Oobleck, is a much slimier slime. It doesn’t come together in the way that the other slimes do, and thus can’t stretch and knead in the same way. But Oobleck is still a lot of fun to play with. Not only is it super messy, but it is a pressure dependant fluid, which means it gets hard if you tap or hit it!
Three of these slimes use borax to pull the slime together (to learn how, check out our science of slime post). Borax has been shown to cause fertility issues in mice when ingested in large quantities. To be specific it was around 5000mg of ingestion per kg of body weight - that would be a grown adult eating 12 ounces of Borax, or a child eating 6 ounces, the equivalent of 36 teaspoons.
The Boraxo MSDS sheet (what we used) gives it a 0 for health, fire, and reactivity, with no personal protection suggested. It does state that it will cause irritation if it is brought into contact with your eyes or ingested. Basically, if you are making a Borax based slime, wash your hands after and don't eat it.
The borax can cause mild skin irritation for those with sensitive skin because it is very alkaline (it has a pH of 9). If that happens, just rub a bit of vinegar on your skin before washing to neutralize the pH.
Given this information, you should make an informed choice on whether or not this type of slime is right for your family.
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