Clean riddles for teens

What comes down and goes up again and again? What is that?

I eat other animals. I have a big mouth. I am green. I live in the water. Who am I?

Thirty white horses on a red hill. First they champ, Then they stamp, Then they stand still. Who are they?

What has a neck but no head?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth I am dissolved into air. What am I?

It can fill a room without occupying space. What is that?

When I look at her, she smiles at me. When I wink at her, she winks at me. When I kiss her, she kisses me back. When I say I love you, she says it back. Who am I?

What can go up a chimney down but not down a chimney up?

I can be as thin as a picture frame but my insides have many things you can see. What am I?

A petshop owner had a parrot with a sign on its cage that said "Parrot repeats everything it hears". Davey bought the parrot and for two weeks he spoke to it and it didn't say a word. He returned the parrot but the shopkeeper said he never lied about the parrot. How can this be?