"The Mystery of Lyle and Louise"

Ideal for studying rotational dynamics.

Lets You Control Location and Depth of Measurements

Used to investigate wavelength in air.

Play sand provides tactile and sensory stimulation necessary for the development of a child's imagination, hand-eye coordination, and fine motor skills such as shoulder stability, forearm rotation, wrist control, and hand strength. Play sand also encourages creativity, visualization and social interaction.

Model Neuron Pathways.

A unique manufacturing process makes these models exceptionally lifelike. All feature a durable, yet flexible, rubberized material applied over molded plastic bone structures allowing for flexion and extension, inner and outer rotation, adduction and abduction, and other realistic movements of the joints.

Vector of yellow fever. Unstained.

Soft non-woven outer facing wicks moisture into a cellulose core, which quickly absorbs and disperses fluid.

Black, soft; most widely mined.

Pale pink felsite, with small sanidine phenocrysts.

Gray to buff, with numerous ooliths and fossil fragments.

Useful for metal filing or glass cutting.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Brownish black, intermediate stage between peat and bituminous coal.

Lustrous, black 'hard coal'.

Light gray, fine small clasts.