63-Piece Worcester Electrical Circuit Board Kit Science Classroom the drilled aluminum ball gives

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

Simple-form Boyle's Law apparatus pairing a graduated plastic syringe on a wooden block with a weighted piston

transistor

5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration

63-Piece Worcester Electrical Circuit Board Kit Science Classroom the drilled aluminum ball givesHard plastic 13x13 inch Worcester circuit board with 12 metal poles and 4 banana terminals, the foundation for student built series parallel circuits and electromagnetic induction demonstrations.