My three brothers, my cousin and I are stood in a line. I am the shortest of all my brothers and I am at one end of the line. At the other end of the line is my cousin, who is the fattest out of all of us. My tallest brother is in the middle of the line. We cannot move away from where we stand and yet we are very flexible. We are very useful; people would struggle without us. What are we?

It is easy to see, not easy to atop,

Clouds hang around, and people like to slide down.

What is it?

It is made for one but meant for two;

It can be worn for many years but usually just a few;

You won’t ever need it unless you say you do.

Tell me what?

If you know it, you feel accomplished. If you don\’t know it, you feel stupid. What is it?

People make jokes about me running. I store items for you so they don’t go bad. I light up when you open the door. What am I?