Make your own Flubbler!

Ever wanted to make your own flubber? Give it a go and keep the kids entertained for hours!

For this experiment you will need

  • 120g craft glue,
  • Liquid food colouring/ liquid water colours (any colour of your choice)
  • 125 ml of cold water
  • 250ml of hot water
  • One tsp of borax.


First of all you will need to mix the cold water, glue and food colouring and leave to one side.


Next, mix together 3/4 of the hot water and borax, until the borax is completely dissolved.


The final step is to slowly add the glue mixture to the borax mixture and mix well before pouring off any excess water and kneading the flubber with your hands.





The Science bit:

The mixture of white glue with borax and water produces a putty-like material called a polymer. In simplest terms, a polymer is a long chain of molecules.

Many natural and synthetic polymers behave in a similar manner. Polymers are made out of long strands of molecules like spaghetti. If the long molecules slide past each other easily, then the substance acts like a liquid because the molecules flow. If the molecules stick together at a few places along the strand, then the substance behaves like a rubbery solid called an elastomer. Borax is the compound that is responsible for hooking the glue’s molecules together to form the putty-like material.

Why not try experimenting with different colours?

Top tip: Once you have created your flubber you can seal it in a zip lock bag so that it can be used over and over again as it will prevent it from drying up.

Check out the video below for another tutorial on how to make flubber: