This heavy-duty rock tumbler does much more than ordinary rock polishers- it actually changes rough stones into beautiful high-luster semi precious gemstones (note: takes approximately 30 days to achieve). You can even make jewelry and key chains with the settings included in this set. This U.L. Listed set includes a tumbling machine with heavy-duty motor, rough semi-precious stones (including amethyst, jasper, agate and others), grit, polish, jewelry settings, glue and instruction manual. Ages 10 and up.
This "Seriously Funny Science Book" features 50 hands on experiments
that explore the human body, 99 additional Science Fair ideas, and a comprehensive 35 page guide to create award winning ...
Weather Station; Solids/Liquids/Gases; Volcanoes. How does a thermometer work? Why
do raisins dance in Seltzer water? What are volcanic hot spots? Hours of fun with hands on science experiments! the ...