In a medium mixing bowl, whisk the flour and salt to combine.

Add the cold water and oil. Mix until well incorporated.

Remove the playdough from the mixing bowl and place it on a flat, working surface. Knead for about 5 minutes until soft and elastic dough forms.

Divide the dough into 3 equal parts and place in separate bowls.

Add ½ teaspoon of purple food gel into the first bowl. Knead until the colour is evenly distributed.

Add more colour, if necessary, until you achieve your desired shade of purple.

Add ½ teaspoon of green food gel into the second bowl. Knead until the colour is evenly distributed.

Add more colour, if necessary and knead again until well mixed.

Add ½ teaspoon of red food gel into the remaining bowl.  Knead until the colour is evenly distributed.

Add more colour, if needed, and knead until you obtain your desired shade of red.

You can now add your Batman Lego characters. You can store the playdough in plastic Ziploc bags for up to 1 month.

Enjoy!