Exhibition Idea 2.

My second idea works around a circuit with two light bulbs and two batteries.

The difference to the finished project from this diagram is that it will have two of the pieces of wire will be left loose on the inside contacts of the light bulb. There will also be another length of loose wire which is where the if/else interaction comes in. If the user decide to join both the batteries together and both lights together then they will have an outcome of both of the lights being on. Where as if they connect only one light and battery then they will only have one light come on as a result.