Answer:
When they are caught, they are thrown away. When they escape, you itch all day.
Screaming, soaring seeking sky. Flowers of fire flying high. Eastern art from ancient time. Name me now and solve this rhyme.
You’ll have me at night and if you remove the first letter I denote the top, such as on a train
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
You use it between your head and your toes, the more it works the thinner it grows.