Howtosmile.org is an online tool that allows educators to search, collect, and share high-quality, hands-on science and math activities. Collections include inquiry-based learning resources from the Lawrence Hall of Science, Exploratorium, Science Museum of Minnesota, Children's Museum of Houston, New York Hall of Science, and ASTC. Major funding was provided by the National Science Foundation from award #0735007.
Additional support was provided by Oracle and The Camille & Henry Dreyfus Foundation for the creation of STEM topic pages.
We used this activity as a hands on for an exhibit on sound. It was a great, easy and cheap take away. Kids loved it.