A LED activator.
Step 2: In goes the pieces...
Push the LED in to the pcb where it's marked.(Flat/short side of led is -)
Push the resistor in.
Solder or glue the thin wire on to each side of the battery.
Push the + through the hole and - through the hole at the bottom.
connect the resistor(one side) to the led +.
connect the - of the led to the - of battery.
connect the + of the battery to the resistor(other side).