Answer:
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
It is destruction made out of thin air, You hear it howl and give a prayer, Through barns and houses it will tear. It is a deadly funnel, Of violent and twisting air.
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own. What are they?
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find.
People take me on walks and I run and have fun. What am I?