My teacher uses a Noise Meter similar to this one. The Noise Meter is a cool way to remind students the correct noise level that they should be using! You just use the paper clip and move it to the appropriate noise level the students should be using.
Magnetic Puzzles - stick a little magnet onto the back of each puzzle piece, then put together the puzzle on a cookie sheet! Great way to keep from losing puzzle pieces, easy clean-up, and great for car trips!