Hand-Crank Van de Graaff Generator, 100,000V Biology Shows oxygenated and deoxygenated blood

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

controllable flame shape during laboratory heating

and wood for multi-material pendulum

Diamond lattice kit with 39 carbon atoms and 60 connectors for building the tetrahedral covalent network that gives diamond its exceptional hardness and optical properties

Hand-Crank Van de Graaff Generator, 100,000V Biology Shows oxygenated and deoxygenated bloodHand cranked to convert mechanical work into electrostatic energy, this Van de Graaff generator delivers spark producing high voltage demonstrations in the physics classroom.