Combine 2 cups baking soda, 1 cup cornstarch and 1.5 cups water in a sauce pan.
Whisk to combine.
Cook over medium heat, stirring constantly (important) until mixture thickens. It will take anywhere from 3-6 minutes.
Remove from heat and cool.
Knead until smooth.
Roll out your dough and cut shapes out.
Air dry -or- to bake: Bake on a cookie sheet line with parchment paper in your oven on the lowest setting (usually 170-200 degrees F) until dry. It usually takes a couple hours
