(hint; use a metal, or other material as a spacer, to allow rod to extend the rod through both ends of jar, for a simple support and lining the jar with rubber matting will extend the life of the plastic)
(hint; use a metal, or other material as a spacer, to allow rod to extend the rod through both ends of jar, for a simple support and lining the jar with rubber matting will extend the life of the plastic)
Make a Water Purifier
Make a Drill Powered Rock Tumbler
Make a Paper Plate Reflector
Make an Arc Carbon Lamp