We used the PHeT simulation to look at how capacitors act in circuits. We quickly saw relationships between charge and voltage for a given capacitor and between the physical qualities of the capacitor and its capacitance.
This is new time in the year to talk about capacitors for me. Usually I don't introduce capacitance until we already have a detailed model for the electric force. It seems to work well, but we'll have to loop back later to talk about dielectrics.