Circuit 1: Use this one to power a motor and see what happens when you rotate the variable resistor
Circuit 2: Light an LED and see what happens when you put the LED in the wrong way around
Circuit 2a: Combine the 2 previous circuits to make the motor and light turn on when switched.
Circuit 3: Use a logic chip to switch the light on and off using 2 switches
Circuit 4: change the type of logic cip and see what happens.
Circuit 5: Use an Astable chip to light the LED. If you can get it to work...