What is electricity? What is electricity? I know very little physics. I know that there are neutrons, positively charged protons and negatively charged electrons in a particle.
I know that electrons have some role in electricity. I have read that flow of electrons is electricity.
But I don't understand how flowing electrons can make a bulb light? or a fan rotate?
This may be a silly question here, but I couldn't find a better place to ask it.
 A: The definition of the word 'electricity' is broad.  I like Wikipedia's disposition, which was clearly written by someone who was science-minded, and worded carefully to avoid creating more confusion:

Electricity is the set of physical phenomena associated with the presence and flow of electric charge.

Without subdividing the concept, we can't answer your specific inquiries.  Physics has many specific and rigorous definitions that do answer your question.
You need to learn the concepts of charge, voltage, and energy.  These are all concepts with numbers and units.  Additionally, you need to understand current as a flow of charge.  Since it's a flow, that is referencing some amount of charge that moved over some amount of time, thus it has units of charge divided by time.
In a similar manner, voltage is energy divided by charge.  This reflects the conceptual basis that charge, at some voltage, contains energy.  However, for most practical applications, we're more interested in current than charge alone.
Voltage can be said to be a derivative concept of the electric field, but I would ignore this for your level.  I would also ignore the atomic underpinnings (which is, btw, that some electrons in a conductor are free to move about).  Voltage is the electrical analog for height of a water reservoir, or water pressure.  You need to understand that broadly, (charge)x(voltage)=(energy).  Put into per-time format, it is (current)x(voltage)=(power).  Power is energy per unit time.  Light bulbs and fans have power requirements, because they conduct a continuous process where energy is ultimately converted into thermal energy.
I would be extremely skeptical of any purported "understanding" that does not use these concepts such as current, voltage, and power.  An explanation might be able to mask the fact that it's using them, but if the concepts are absolutely absent, then the explanation must be wrong.  Charge and energy are conserved quantities.  That means that they move from place to place, but they do not disappear from our universe.  We find relationships that govern those transitions.  That essentially sums up all reality as we know it.
A: Materials in our world are made up of atoms. Atoms are made up of different particles, one of which is electrons. Electrons can be made to jump from atom to atom inside a material.
An electric field is the force that pulls electrons. Electricity is the movement of electrons in an electric field.
The measure of how fast the electrons are moving is called current. The measure of the strength of the electric field's force on the electrons is called voltage.
Electrons flow more freely in some materials than in others. Materials that allow electrons to flow easily are called conductors, and materials that do not allow electrons to flow as easily are called insulators.
Electricity is useful because it allows us to easily move energy from one place to another. Electrical energy is easily converted to other forms of energy, such as heat, light, or motion. To generate electrical energy, we can convert heat, light, motion, chemical, or nuclear energy into electrical energy.
In electrical design, we use both conductors and insulators to move energy where we want it to go. We also use conductors and insulators to convert electrical energy to other forms of energy.
