Motor Demonstration Board Pack Size_10 the flywheel light enough to

the flywheel light enough to drive by breath for hands-on reciprocating-engine study

letting students rub one half against the same cloth and compare insulator and conductor behavior in triboelectric charging

5 inch Alnico bar pair with steel keepers

the drilled aluminum ball gives a lightweight contrast to steel and brass balls of the same size in pendulum period and momentum-transfer demonstrations

Motor Demonstration Board Pack Size_10 the flywheel light enough toLow voltage DC motor with a current limiting series resistor on a demonstration base with 4mm plug connections, sized as a load that visibly spins when current flows in the circuit.