Laboratory equipment, namely, Vande Graaf generators for use in educational institutions; Tesla coils; electric and steam motors for use in educational institutions; gyroscopes; magnets; material samples consisting of aluminum, brass, carbon, polyethylene, copper, steel, nylon, polyetrafluoroethylene (PTFE) resins, homopolymer acetal (POM-H) and wood for density testing, Leyden jars for use in educational institutions, electroscopes; Faraday cages for use in educational institutions; voltaic cells; Wheatstone bridges for use in educational institutions, resistors; thermostats; steam generators for use in educational institutions; calorimeters; inclined planes, weights for balances; timers; force tables; pendulums; magnifying lenses; laboratory kits for the study of electrostatics comprising glass, acrylic and hard rubber rods, cotton, faux fur fabric and silk, pith balls, graphic balls and neon lamps; laboratory kits for the construction of electric motors consisting of supports, pole pieces, armatures, wire and brushes; Laboratory kits for the plotting of electrical fields comprising conductive paper, graph paper, electrodes, electricity conducive inks, conductive paper, cork boards; Laboratory electromagnetic kits comprising iron cores, iron filings and magnets; Laboratory kits for the construction of voltaic cells comprising electrodes of copper, iron, zinc and aluminum; Laboratory kits for determining mass, density and specific gravity comprising cubes and/or cylinders of metals, plastic and wood; Laboratory kits for the construction of Roman and Catenary arches consisting of pre-manufactured blocks; Laboratory chemistry teaching aids, namely, chemicals, laboratory ware comprising test tubes, flasks, distillery components, burners, scales and testing papers; Laboratory earth science teaching apparatus, namely, rock specimens, charts. Laboratory biology teaching aids, namely, biological specimens, microscopes and water baths; Laboratory mathematical teaching aids, namely, two and three dimensional geometric blocks, directional compasses, protractors, rulers and calculators