Super Easy Slime Recipe
My 5 year old is SLIME OBSESSED at the moment! Not a weekend goes by where I haven’t tried, or at least been asked (4 thousand times) to make slime. We’ve YouTube-d and tried all sorts of combinations of toothpaste, shaving cream, borax, flour, dishwashing liquid, white glue, clear glue and ENDLESS tubes of glitter. Some of them KINDA worked…….most of them DID NOT work.
But today……. we had a slime breakthrough and it was actually pretty easy in the end. The below recipe is for quite a gooey slime so experiment with your borax/water quantities for a different result. Now go forth and slime!
What you’ll need
- Borax (found in the cleaning aisle of the supermarket and about 5 bucks)
- Craft Glue. We used white craft PVA glue from Kmart. $4 but you can apparently also use clear glue or glitter glue which we’ll try next time. Oh and grab two lots so you can have at least a couple of tries.
- 2 bowls
- Glitter, food colouring, sparkles, confetti whatever you want to add to make your slime special. We needed LOTS of glitter to make it work so get a big tub.
- Air tight containers to store
And a good tip to remember……vinegar dissolves slime.
How to make it
- Mix 1 teaspoon of borax in a bowl with 1 cup of warm water
- In the other bowl add 1/2 cup of glue with 1/2 cup of water and mix until it’s fully combined
- Add your sprinkles, your sparkles, your food colouring until you’re happy with the colour, the sparkle and the shine.
- Pour the glue into the borax mix. We tried 2 batches and 1st batch we poured glue into borax, 2nd batch we poured borax into glue. 1st batch worked better, so not sure it really matters but that’s what we found. You’ll notice straight away that it starts to polymerize* which is very cool.
- Stir like there’s no tomorrow. Get those biceps working and really stir it. Try and get as much of the borax/water combined with the glue as possible. Keep stiring, keep stiring!
- Eventually you’ll see it come together enough that you can put it on the table and start kneading it out. Don’t worry if there’s a bit of excess water, just tip it out.
What did we learn?
The two main concepts for slime science are polymers and Non-Newtonian Fluids. The white glue in our slime is a polymer, a large chain of molecules that allows it to be poured. When we add the borax it changes the structure of the chain making the polymer thicker turning it into our awesome slime!
A Non-Newtonian Fluid is neither a true liquid or a true solid. You can pick it up like a solid. However, it will begin to flow like a liquid and will also take the shape of the container.
The Rules of Slime (as I told my daughter)
- Slime is for outside, it’s messy and sticky but also lots of fun for OUTSIDE play!
- It’s for “big kids” only to play with, which for us means you have to be over 4. Borax in such small quantities is fine to play with but NEVER to be eaten, so don’t leave slime around kids who are likely to put it in their mouth.
- When you’ve finished playing with it store it in an air tight container. We use glass jars but a sambo bag would also work.
- Always wash your hands when you’ve finished playing
- polymerization is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks.