Elenco Electronic Playground 50-in-1 Experiments - Manual (Page 21)

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Now you have capacitors in parallel, and you can
probably predict what will happen. If not, just think about
the last experiment and about how resistors in parallel
combine, or think in terms of the water diagram again.
Connect the wires according to the Wiring Checklist and
press the switch several times to see.
Capacitors in parallel add together just like resistors in
series, so here 10
μF + 100μF = 110μF total circuit
capacitance. In the water diagram, we are stretching
both rubber diaphragms at the same time so it will take
longer than to stretch either one by itself. If you like you
may experiment with different resistor values as you did
in experiment #7. Although you do have two disc
capacitors and a variable capacitor (which will be
discussed later) there is no point in experimenting with
them now, their capacitance values are so small that they
would act as an open switch in any of the circuits
discussed so far.
EXPERIMENT #9: Large Dominates Small - Capacitors in Parallel
Wiring Checklist:
o 27-to-56
o 55-to-43
o 36-to-34-to-44-to-42
o 45-to-3
o 37-to-35-to-26-to-4
Water Diagram
On/Off
Valve
Rubber
Diaphragms
Rocks
Pump
Schematic
Rocks
Water
Meter