Stimulation is the encouragement of development or the cause of activity generally. For example, The press provides stimulation of political discourse. An interesting or fun activity can be described as stimulating, regardless of its physical effects on senses. Stimulate means to act as a stimulus to; stimulus means something that rouses the recipient to activity; stimuli is the plural of stimulus. A particular use of the term is physiological stimulation, which refers to sensory excitation, the action of various agents or forms of energy on receptors that generate impulses that travel through nerves to the brain (afferents).
Scarabs were made in a wide variety of materials, such as carnelian, lapis lazuli, basalt, limestone, malachite, schist, serpentine, turquoise, colored glass, and alabaster. Pottery scarabs were also produced in terra-cotta molds, carved when dry and different colored glazes applied.
Currently voted the best answer. Typical erasers are made of rubber, but more expensive or specialized erasers can also contain vinyl, plastic, or gum-like materials.. http://en.wikipedia.org/wiki/Eraser. More and more of today's erasers are made from something other than rubber! While some of the pink erasers you find on pencils are made from synthetic rubber blended with pumice (a grit that enhances its ability to erase), an increasing number of erasers are made from vinyl. Vinyl is a type of durable, flexible plastic..