Check that kiln has fuel inside. There is also link in wiki, that will help you to understand some essentials of the game http://ringofbrodgar.com/wiki/Glossary
Avatar by SacreDoom Java 8 - manually downloads - good to check for actual versions url here: viewtopic.php?f=42&t=40331 Remember what the dormouse said: Feed your head Feed your head
after it has fuel in it. Make a pyrite using two cats gold and use that to right click the kiln. this will light it. Same thing if you have 2 sticks and make a fire. Fires kind of suck though because they can go out before you light what you want.