Slime Time!

The best thing about slime is that in addition to being super fun it is a great way to learn about polymers and how these behave. Polymers are long strings of molecules. Slime is constructed from two key ingredients: Borax and PVA Glue. These materials when combined create a chemical reaction that results in the production of 'Slime'. The Borax molecules hook on to the glue molecules to create a long string of connected molecules. Pretty cool!


Better yet, slime is also a 'non newtonian' fluid. Newtonian fluids have constant viscosity. Viscosity is a term used to describe how thick or thin a fluid is. For example, honey is more viscous than milk.


As slime is a 'non newtonian fluid' the viscosity is not constant- it changes depending on the force you apply to it. For example, try pulling your slime apart really quickly. What do you think will happen? It breaks apart! But if you let it slide from your hand gently it will flow like runny honey. 

So many things to discover and experiment with in the field of slime!

There are lots of ways to make slime. We are sharing what we think is our best recipe with hints and tips to make sure you have perfect slime everytime!



Amazing Slime Recipe


You will need: 

  • PVA Glue

  • Borax (local gardening store)

  • Warm Water

  • Plastic Spoon

  • 2 plastic cups

  • Mixing Bowl

For a borax free slime. Substitute contact lens solution. Add this at the same stage in the recipe. The resulting slime isn't as long lasting but still lots of fun to play with. 

This is a great way to learn about magnetism and the strength of attraction using neodymium magnets.

Magnetic Slime


You will need: 

  • Slime from Amazing Slime Recipe. 

  • Neodymium Magnets

  • Iron Fillings.

Simply roll the filings into the prepared slime mix and then explore using the magnets. 

So much learning here about polymers and light and temperature.

Heat Sensitive Slime 


You will need: 

  • Amazing Slime Recipe

  • Food colouring

  • Thermochromic Pigment

Just add the food colouring and thermochromic pigment during the glue mixing stage in the slime recipe. 

Choose your colours wisely (e.g. opposites on the colour wheel for most impressive colour changes. 



Incredible Bouncy Balls


You will need: 

  • Borax (Gardening section, Mitre 10))

  • Warm Water

  • Corn Starch

  • PVA glue

  • 2 small mixing cups

  • Food colouring

  • Plastic spoon.


A great way to explore chemical reactions and learn about polymers