You will need:
A clean table
1 cup cornstarch
About 1/4 cup water
Food colouring
1 zip-lock plastic sandwich bag
Method:
Pour 1 cup cornstarch into the sandwich bag, slowly add about 1/4 cup water mixed with a few drops of food coloring.
Carefully press the excess air out of the sandwich bag and seal it – closed.
Knead the sandwich bag until the mixture is well-blended and smooth.
Try not to puncture the bag!
Tip out and goooooiiiing crazy!