6. To change colour (optional), add acrylic paint or food colouring until your desired colour is reached.
7. Mix in bowl with spoon until combined.
8. Make your borax* mixture (activator) by combining one teaspoon of borax powder with one cup of water.
9. Add 3 tablespoons of activator (one tablespoon at a time) and about 1/2 cup of shaving foam. You'll know it's ready when it's not sticking to the bowl and you can play with it - if it's too sticky, add more shaving foam (another 1/2 cup) and another 2 tablespoons of activator.
10. Put mixture on a placemat or non-stick table and knead - pulling and stretching it - until it has come together. Then you're ready to play with it!
* Borax is a common household cleaning product. Care should be used when preparing the activator - avoid contact with eyes and mouth. Always have a adult present when preparing.