That page also links to reports on other projects. A slight variation of dung jars is to place wood such as a piece of a tree limb in a jar. Select a weather beaten tree limb with or without bark and cut to 6 inches long or any convenient length, stand it on end in a quart or larger jar. That will provide ideal conditions for fungal growth. It will also be excellent for the growth of any wood boring insect larvae inside the wood or between the bark and wood.
Most wood borers are beetles.
You are sure to produce some fine fungus specimens. If you start several jars with various types of wood from rotten logs to live branches, you will grow a greater variety of fungi and increase your chances of hatching out some insects. The wood pieces may be any diameter from twig to two inches or more. Let wood jars sit for many months. Wood is difficult to digest and it will take some insects and fungi many months or years to mature.