The clay does not require the use of an expensive kiln and dries naturally in the air. As you do not need any fancy equipment and it is non-toxic, this type of clay is quite popular, and can even be used by kids.
There are two approaches to painting air-dry clay. You can paint on the dry clay, or color it before it dries.The best clay for painting is your white clay, as it will show up the colors well.
To color the clay before it dries, first knead it to warm it up. Then add small amounts of color at a time and knead it through the clay to get an even color.
Once you have sculpted and allowed your clay piece to dry properly, it is time to paint. Make sure your hands are clean and dry as you do not want to create any smudges.
Once you are done painting the clay, you need to seal it to protect it and make it waterproof. If you do not seal the paint, it will eventually begin to peel off.