I used to use a whisper phone! DIY Whisper Phones~ Children use these to hear themselves as they quietly read aloud. This post has great directions and with pictures that explain how to make them with inexpensive materials.
Library Centers: The Book Fairy-Goddess: Centers in the Library. Nice post about how one school librarian does centers in her library, giving the scoop on what worked, what didn't, and what she's planning for the new school year!