Probably ceramic paint I would assume. And I know what you're talking about for the clear coat that you fire in the kiln that makes the ceramic all glossy. Maybe the craft isle at the store just look around and see what where is.
<blockquote><b>Quoting Alesa Lacovara:</b>" is this recipe for just one ornament? trying to figure out how much supplies i need to buy for multiple ornaments."</blockquote>
Probably depending on the kids ages maybe 2. I doubled it for my 4 yr olds and got 2-3. Also just add most but not all of your water at first and mix it and add more as needed cause sometimes mine was too dry and sometimes too wet. So I just added little bits as needed.