Posting another link or blinkie or whatever you call them t o my blog?

OK, I've got a question.  There are so many great blinkies and other things I see on the side bars of people's blogs, I would love to add to mine.  But for the life of me, I cannot add them.  I am not doing something correct , but not sure what.  I'm involved in Operation Write Home and would love to have their logo or blinkie or whatever it's called on my blogs.  So if there is anyone who could walk me through this I would be your new best friend.  This is your challenge for today.  It's a lot harder than making a card, trust me.  Have an awesome day everyone.