Here is the link to today's assignment: http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc #1: A circuit that won't shut off if one light bulb is removed #2: A circuit that that will shut off if one light bulb is removed #3: A circuit with one switch that completes the circuit on contact #4: A circuit with one switch that turns off the circuit on contact #5: A circuit that has two places to turn off/on #6: A circuit with three bulbs, one of which can be shut off without affecting the others #7: A circuit with one switch and a buzzer that can be turned off or on