Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base Rod-mounted plastic ball-bearing pulley with

Rod-mounted plastic ball-bearing pulley with a 50mm wheel on a 150 by 10mm rod

Seventeen-material solids kit with two pieces of each substance in mixed sizes

this galvanic skin response data-logging sensor tracks changes in skin conductivity tied to emotional and physiological states

Heavy-duty metal inspection quadrat divided into 25 equal squares

and magnetic field — on a color touchscreen display

Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base Rod-mounted plastic ball-bearing pulley withPart novelty gift and part geology specimen, this single large lump of genuine American coal ships in a cotton drawstring bag with a linked science experiment activity.