Everyone finds Electricity fascinating even though it may be difficult to understand at times.
In order to make successful circuits you must get organised and try to keep things neat and tidy otherwise it is very easy to get mixed up and difficult to see where things are going wrong.
A jumble of long wires tangle up on the desk is a bad way to introduce the topic of electricity.
A common mistake which prevents all circuits from functioning is to allow ‘short circuits’. This is when the bare ends of wires or croc. clips touch where they are not supposed to and allow electricity to flow along a path leading directly back to the battery - this quickly flattens the battery and spoils further circuits.