How do you give someone a prop?

You go to someone's profile and typ something on their wall. Below the box in which you can type you can see two buttons. One for a smily and one to select a prop. Just press a prop you would like to give and then press post.
I hope this picture helps.

when you write it shows two things fellings and props it looks like a baige the prop does

go on someones wall and post a comment and then from the start when you start typing look down and you will see a little happy face thing and new to it is props click on it and themn you can pick the prop you want to give them. Hope that helps somewhat. i know it took me a while to learn how to give props too.