Kundalini is a powerful energy that lives inside all of us. It is kind of like a big coiled snake inside of you. It sits at the base of your spine and is asleep most of the time. When it is "awakened" it starts to uncoil and travels up your spine, which can give you new feelings and new powers, like being able to do things you couldn't before. People use different ways to awaken it, like yoga or meditation. When the kundalini has fully uncoiled it will reach the top of your head, and then you can feel amazing, like you are on top of the world.