Pith Ball Electroscope Research Lab Plastic-bodied wave apparatus with eccentric

Plastic-bodied wave apparatus with eccentric discs that drive metal rods up and down as the handle turns

Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input

Fullerene C60 kit with 60 atoms and 90 bonds for building the spherical cage structure characteristic of fullerene carbon allotropes

5 inches thick

Pith Ball Electroscope Research Lab Plastic-bodied wave apparatus with eccentricTwo pith balls suspended on unspun silk from a brass pillar, fanning apart visibly when a charged rod approaches to demonstrate electrostatic repulsion and induction.