Most of us are familiar with pianos and organs. These are distinctly different instruments whose pitch is controlled by a keyboard mechanisms. The piano is rather like a mechanized zither; by touching a key you trigger a mallet which strikes wires fastened inside its body. However, when you press the key of an organ ( a member of the wind family) you direct the airflow to specific airpipes that affect the pitch.
In the Stearns collection, there several other wind instruments whose pitch is also controlled by keyboards, including the laudophone and rocking melodeon , and of course, the keyboard accordion.