Give Euler's Disk (pronounced like "Oiler's Disk") a spin and observe the hypnotic display of light and continually changing sound. The movement seems to go forever. Available from Educational Innovations, Inc. at www.teachersource.com
"Glove-o-Phones" Science Lesson Trailer. Students discover how a vibrating balloon is like their vocal cords. They build a musical instrument that makes weird sounds when they blow into it. Rock-it Science lessons combine storytelling with hands-on experiments. To see the full lesson and download the free Teacher Guide, go to http://www.rockitscience.com and join our Online Teacher Community.