I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
Creatures of power, creatures of grade,
creatures of beauty, creatures of strength.
As for their lives, they set everything's pace.
For all things must come to live.
Under their emerald embrace.
Either in their life or in their death.
Select a pack of riddles and try to solve it in an interesting way.
This riddle appears in the following downloadable PDF files: