Homemade Watercolors

The Goods:
-1/2 cup baking soda
-1/4 cup cornstarch
-1/4 cup white vinegar
-1 teaspoon corn syrup
-Food coloring  

The Deal:
1) Combine all of the ingredients in a pourable container (I used a Pyrex measuring cup).
2) It will immediately begin to foam and froth and bubble. Using a fork, quickly whisk it until everything is fully combined. If you don’t do this quickly enough, the mixture will thicken and harden before you’re able to beat all of the ingredients together. Owing to this fact, be sure to have everything ready to go when you begin.
3) Pour the mixture into an ice cube tray, individual containers (such as small yogurt cups), or a plastic painter’s palette (available at art and craft supply stores), portioning it out evenly amongst however many containers you opt to use.
4) Add drops of food coloring to each individual portion of mixture. The number of drops used and the colors you select is entirely at your discretion here. Just continue adding drops and stirring (use a wooden stirrer, such as craft sticks, toothpicks, or chopsticks) until you achieve your desired colors. When you’ve finished creating all of your colors, go back one more time and give each individual color a last stir, to fully incorporate the color into the base.
5) The watercolors need around two-three days to fully dry and set. You can certainly use them as soon as you’ve made them, but be aware that they’ll slosh around if you attempt to transport them.
6) When ready, dip a wet paintbrush into your watercolors and paint away!