Electricity is electrons in motion.
Electrons are a part of the atom that carries a negative electric charge.
Atoms are the building blocks of the universe and can be found in all matter. They can be made to move and do work. The flow of electrons can be affected by the materials that provide a path for the electrons. Materials such as copper, silver and aluminum are called conductors because electrons flow through them easily. Electrons do not move easily through materials such as rubber and glass.