Sun clock that helps with telling time. This is a cute and easy way for kids learning how to tell time, because it is right under the clock and the rays represent the 5 minute intervals and that can make it easy for kids.
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.