Now, every blog and website needs a little color and graphics every now and then. A good source for images would be http://www.1clipart.com. Here you can find all sorts of free images like this one:
And the cool thing about this site is that you can edit the images first. Would you rather have the image in grayscale? It can fix that for you. Want it in an oval? It'll do that to.
And of course, best of all, it's free.