Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base 5-inch compact and 6-inch long-format

5-inch compact and 6-inch long-format units

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

and funnel

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

and the structural elements of geological faults through a five-piece teaching model with an identification key

Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base 5-inch compact and 6-inch long-formatPart 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.