Pour the water and the salt into a pot and stir over medium heat until the salt is dissolved.
Next add the rest of your ingredients - flour, cream of tartare and oil. Mix well until this becomes a sticky dough.
Next add the glycerine (if using). Allow the dough to cool and then separate into portions - make a well, and then add a few drops of colouring to each one and mix until combined.
Get ready to play with clean hands - and then store it in your Sinchies reusable ziplock pouches in the fridge.
Depending on what food colouring you're using some may stain hands and bench tops.