Each stick rods represent the element 1 element to compare two types of elements, EN, bringing beads from the element box stuck on both sides of the stick.
Wooden sticks each bar represents one of the rare earths to compare the two types of elements EN The element box of beads attached to wooden sticks on the second side.
Each bar represents the wooden block element 1 elements. To compare the EN element 2 type, to bring the beads from element box Martin on wooden block both 2 side.