1 Toilet roll holder 2 Coins that fit snugly inside the toilet roll / or a tealight shell 1 6 cm round piece of cardboard / or an old scratched CD Handful of small stones and pebbles (found at nurseries) Plaster of Paris or tile grout (mortar)
For a dry wall chimney, simply glue the stones all over the cardboard toilet roll holder, leave to dry. In the center of the CD disc, glue the coins one on top of the other. Leave to dry. When the two pieces are dry, place an incense cone onto the coins and place the stone chimney over the coins. Looks just like a smoking chimney.
For a stone and mortar chimney. Cover the cardboard tube with plaster of paris (or tile grout) and push the stones into the plaster of paris. Leave to dry. Follow the steps afore mentioned for the base.
Variation: You can color the "mortar" with acrylic paint, or with powdered oxide (oxide is available in a number of colors from most hardware stores. Green, red, black and mustard).