First off, I would raise the frequency. At 50Hz the inductor(s) and capacitor(s) will need to be rather large for the parameters to fall in to a range of practicality. Then do the math to select values that will give you a good balance between voltage and current. Then you will need to display both the current and the voltage on a dual trace scope. If you have a current probe then connect that to one of the scopes channels and then a voltage probe to the other channel, then put a sinewave source across the inductor, and probe the current and voltage, and then do the same with a capacitor.
If you don't have a current probe, then put a resistor in series with reactive component and for a current reading, measure the current across the resistor (the scope will be showing the volage across the resistor, but it is analogous to current, because voltage follows current in a resistor -- the only difference may be the magnitude). Make the value of the resistor small enough that the reactance of the component is far larger, so the resistance won't appreciably skew the other parameters. Unless, of course you want to demonstrate the role of resistance in the circuit.
I suggest having a set of pre-wired panels with the key components mounted and labeled and perhaps a title, like ("Demo of Phase-Shift in a Capacitor" or "Pure Capacitance"/"Pure Inductance"/"L-R-C"/etc)
And, be sure to try it on your own, to make sure you get the visuals you're after, before presenting it to an audience (you'd be surprised!)
