For example, use a plastic or wooden ruler and a table. Place the ruler on the table and pluck it to see and hear vibration.
Students can learn about the various ways that pitch can be created.
For example,use the ruler again. This time have a shorter portion of the ruler sticking out beyond the table. Pluck it and notice the higher pitch. Students can learn about volume . Pluck the ruler harder and softer to hear the change in volume.