Insert one metal lead of one capacitor - call it capacitor A - into one peg hole in one of the columns of the electronic breadboard. Insert the metal lead of the other capacitor - call it capacitor B - into a different peg hole in that same column. Call this connection "node capacitors."
Insert the the other lead of capacitor A into a peg hole in another unused column of the breadboard. Insert one lead of the electromechanical switch - call it switch A - into another peg hole in that same column.
Insert the the other lead of capacitor B into a peg hole in another unused column of the breadboard. Insert one lead of the other electromechanical switch - call it switch B - into another peg hole in that same column.
Insert the other lead of switch A into another unused column of the breadboard. Insert the other lead of switch B into a peg hole in that same column. Call this connection "node switches."
Insert one lead of another capacitor - call it capacitor C - into a peg hole that is in the same column as node switches. Insert the other lead of capacitor C into a peg hole that is in the same column as node capacitors.
Turn on switches A and B to place capacitor A and capacitor B in parallel to capacitor C. Turn both switches off to disconnect capacitor A and capacitor B from the circuit. Turn switch A on and switch B off to just place capacitor A in parallel with Capacitor C. Turn switch A off and switch B on to just place capacitor B in parallel to capacitor C.