Here is an idea that will blow your mind. Ever considered baking soda and vinegar as food coloring?
Here is an information you might want to know.
Baking Soda & Vinegar – Food Coloring
Explore Jessie Ho’s board “Baking Soda & Vinegar” on Pinterest, a visual … Thisblogger gave her child medicine droppers to put the vinegar in the baking soda.