Simple riddles

You are on your way to visit your Grandma, who lives at the end of the valley. It's her anniversary, and you want to give her the cakes you've made. Between your house and her house, you have to cross 5 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake. How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?

I don't have wings, but I can fly. I don't have eyes, but I will cry! What am I?

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

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

I am there when you are quiet. I am broken when you speak. Who am I?

Who makes it, has no need of it. Who buyes it, has no use for it Who uses it can neither.

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

I have no life, but I can die, what am I?

What goes through a door but never goes in and never comes out?

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