Pour the cream of tartar and salt into a medium sized cook pot, and combine.
Sift in the flour.
Pour in the carrier oil and water.
Heat the play dough mixture through on medium heat.
Stir constantly to completely combine the play dough, and to prevent scorching. Make sure to flatten and stir away any lumps in the mixture. If the mixture thickens too quickly or a lot of lumps appear, turn down the heat. The heating process shouldn’t take more than 5 minutes.
Add in the drops of desired scent, and stir until combined.
Remove the cook pot from the stovetop.
Drop in the desired coloring agent.
Knead the DIY holiday play dough to thoroughly combine.
It takes about five minutes to garner the consistency of store bought play doh, and have a uniform color.