Mix all the ingredients together,except the food colors.

Once it starts getting thick, add the food color.

Continue stirring until the mixture is much thicker and
begins to gather around the spatula.

Remove the dough into a plate to cool.

Though it has all the edible ingredients and safe for kids. But i prefer not to use as edible. But as having just flour, salt and cream of tartar doesn't make it harmful if swallowed too.