A tart is basically a hunk of scented wax with no wick. "Tart" is the most popular name for these items, although some people call them "wax melts" or "wax beads." In order to burn a tart, you need a tart burner. A tart burner is nothing more than a ceramic, glass, or metal container that has a dish on the top that can be heated to melt the wax. They are very similar in size and shape to an oil burner. Tart burners come in both electric and tealight candle designs.