Parallel and Series Circuit Demonstrator Pack Size_5 Semi-stiff nylon bristle brush on

Semi-stiff nylon bristle brush on a twisted stainless steel wire handle

Spare pack of ten low-mass pith balls sized for the standard pith-ball electroscope

and specific-heat comparisons

Five color-coded ceramic ring magnets at 46mm diameter mount on a 15cm wooden dowel

Six-lens optics set of three double-convex and three double-concave glass lenses with ground beveled edges

Parallel and Series Circuit Demonstrator Pack Size_5 Semi-stiff nylon bristle brush onFive bulb circuit demonstrator with 8 removable metal bars on a heavy base, letting students rearrange bars to convert between series and parallel topologies on the same set of lamps.