Best riddles for teens

I sleep when you are awake, I am awake when you fall asleep. I can fly but no feathers to aid my flight. What am I?

You can hold it without seeing or touching it! What is that?

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?

I have a bed but I do not sleep. I have a mouth but I don't eat. You hear me whisper, but I never talk. You can see me run, yet I never walk. What am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place.

A man is found hanging in a room 30 feet off the ground. There is nothing else in the room except for a large puddle of water on the ground. The police can't see any way the man could have climbed the walls to get to where he is hanging. How did this man hang himself?

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

What is represented by this BrainBat Pattern? EST EST EST EST

What goes in dry and hard, but comes out wet and soft?

They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own. What are they?