Thinner plastic allows the soil to heat up better but also tears more easily. Use plastic with a thickness of 1 to 4 mils for best results. Fill in the ditch around the perimeter with soil to hold the plastic in place. You may also wish to add rocks to the edges to help hold down the plastic.
The didgeridoo is a wind instrument traditionally made from the trunk of termite hollowed eucalyptus trees from Australia (like the one pictured at left, which is being played by our mate Lewis Burns).
(click image to enlarge). A traditionally made didgeridoo has several unique features. First, the didgeridoo is primarily a natural, rather than a manufactured object. Traditional didgeridoos are made from a Eucalyptus branch or sapling that has been hollowed out by white ants (a species of termite).erophone because the didgeridoo produces sound with a vibrating column of air; lip-reed because the reed that vibrates the air column is the player's lip.