Best riddles for teens

There are 2 ducks in the front, 1 in the middle, and 2 in the back.... How many are there in total?

I may seem real yet I am not, Once you're gone I'm often forgot. Time here stretches and it shrinks, It all depends on how you think. I may be good, I may be bad, I may be the same as one you've had. What am I?

Once there was a night watchman who had been caught several times sleeping on the job. The boss issued the final warning. On the next night he was caught with his head on his hand and his elbows on the desk. "Aha, I've caught you again," exclaimed the boss. The watchman's eyes popped open immediately and he knew what had happened. Being a quick thinking man, he said one word before looking up at the boss. The boss apologized profusely and went home. What was the one word?

What can be as big as an elephant but weigh nothing?

I eat insects. I live in the pond. I hop. I am green. What am I?

Someone said you sounded like an owl.

When a girl slips on the ice, why can't her brother help her up?

Sometimes I am loved, usually by the young. Other times I am dreaded, mostly by the old ones. I am hard to remember, also hard to forget. And yet if you do, You'll make someone upset. I occur every day everyone has to face me. Even if you don't want it to happen; embrace me. What am I?

We can be boring, Or interesting. We can be long, Or short. We can have pictures, Or just words. Many love us, But many also hate us. What are we?

I have a face like a tree and skin like the sea. A great beast I am, yet small vermin frighten me. What am I?