Oh, here it is!
Mix baking soda with a little bit of water to make a thick paste. Mix in your colors (food coloring works fine, but we've used food to make ours) and add a little of the honey or syrup. This will help when you go to re-wet your paint. Don't use too much or it will dry sticky!
Gather ingredients. You'll need baking soda, corn starch, honey (or simple syrup if you don't have honey... if you don't know how to make it, no worries, there's directions at the end), white vinegar or cream of tartar, something to put your paint in (an empty ice cube tray works well, I found little cups for mine) and, of course pigment or dye for color (food coloring works great, but for some home made options, see below).
Grab a cup of water and a paint brush and paint away! If you've used food coloring, your paint will probably be more vivid than mine. For extra fun, try spraying the finished paint with a little vinegar and watch it bubble!
A little cocoa powder made this brown. Bonus: it smells AMAZING!
*How to make simple syrup: Mix 2 parts sugar to 1 part water and heat until all the sugar dissolves, it should be clear, as pictured.
All of the essential ingredients... and then some...raisins are not required, I just didn't clear my counter.
Also, no honey here, where'd that get off to?
* Making cabbage dye is fun and educational. The pigment that gives the red cabbage its color responds to PH, so you can shift the color red or blue based on the acidity. Boil some cabbage leaves to extract the color. After a few minutes, you can remove the leaves (they're still good to eat!) and keep boiling until you have a concentrated dye. When you mix it with baking soda, it turns blue! Try adding vinegar or cream of tartar and watch how the colors shift. See if you can make fuschia.
*Cabbage and cocoa aren't the only things you can use for color. Try turmeric for yellow, paprika for red, cinnamon and thyme and ginger... a rainbow of spices in your cupboard!