This is a breadboard.

This is a ciruits it lets electricity get from one place to another.

This is Electric Circuit it lets energy transfer from the battery to the light bulb

This is a soldering pen we use it to melt a element named flux we need it to melt it so the objects stay together.
This is called flux, flux is a metel that melts and forms a ball that melts to objects together.
Soldering is where we get a soldering pen and flux and we ment the together so that it will try and they will stick together.