Right now you can get six pairs of kids sunglasses for $9.99 from Graveyard Mall. These are licensed sunglasses that are available for boys and girls ages 3-5 or 6-8. These ship for free too.
These would be great to add to a birthday goody bag or just for the kids for the summer. I bought some of these sunglasses almost two years ago (WOW!) and they are still around and being worn.