We have made some simple circuits already. However, everyday applications already lead to more complicated circuits. We can understand these just by envisioning where the current is flowing and where the energy inputs are. Here are some things to think about and do as we start the section on circuits.

• Make a sketch showing how the pipes in a house are arranged, so that we can be using water two places at once -- Dad is washing the dog while Mom is filling the fish tank.
• Make a sketch showing how the wires in a house are arranged, so that we can turn on the porch light or the radio or both at once. (Of course, you could build an actual circuit demonstrating your solution to this one -- replacing the radio by a buzzer!).

Check the box when you are done: