Best riddles for teens

I have seas without water. I have forests without wood. I have deserts without sand. I have houses with no brick. What am I?

I am small. I can be scary. I have eight legs. I spin a web. What am I?

There is a box full of marbles, all but two are blue, all but two are green, and all but two are red. How many marbles are in the box?

What happens when you throw a blue rock into the yellow sea?

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

A public library suddenly announced that each member could borrow an unlimited number of books and not return them for up to six months. Why?

I have keys but no locks. I have a space but no room. You can enter, but can't go outside. What am I?

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?

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?

I live in a house. Each Halloween I stand in a jack-o-lantern and get shorter as I grow old. What Am I?