Short clean riddles for teens

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

I am a nut with a whole. What am I?

I am the building with number stories. Find me who am I?

I can fly but I have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?

Everyone has it and no one can lose it, what is it?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. I am a...

There was a railroad crossing without any cars and trucks! Can you spell that without using any "R"?

It is just something that everybody does at the same time. What is that?

Which vehicle is spelled the same forwards and backwards?

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