2. Energy is important because we wouldn't live without it, in fact, TIME wouldn't exist without it.
3. Everywhere! Energy is so small that you can't see it with a strong microscope, but Energy can power thing so if you see a wire powering a lamp you can see that energy is powering that lamp.
4. I tell them... " Well energy is a powerful thing. You can't see it but you can know it's there. For example, a lamp is lighting a dark room, you know that eletricity is powering the lamp but whats powering the eletricity? ENERGY!!! or a car driving on the highway, you know that gas was powering the car but whats powering the gas? ENERGY!!!