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What am I?
I have a head, but I don’t have eyes or ears. I foam at the mouth, but I never bite. I roar but I have no tongue. I lie in a bed, but I have no back. I rise, I fall, I rush and run, but I have neither legs nor feet. I was born in the mountains, but I go down to the ocean whenever I can. I cannot keep still for a moment. I am as restless as can be. What am I?

strange, very strange. Even don't know what to think of....

I have no ideas. I give up.

Marina, the answers like yours are not accepted . You can try and ask questions to find out what it is.

is it something concerned with water?

YES!!!

And what is this something concerned with water?

I guess it is a river or a stream

Your guess is absolutely right!!!