What's this?
It's a lamp.
When our hands are wet? Can we touch something electrical?
No, we can't.
Does it use cells or mains?
cells.
What's this?
It's a battery holder.
What's this?
It's a switch.
Does it need cells or mains?
mains.
What are these?
These are cables (wires)
What are these?
These are batteries.
Does this circuit work?
No, it doesn't.
Does it need electricity?
No, it doesn't.
Does this circuit work?
Yes, it does.