Plastic ruler, craft stick and pen as makeshift thumb piano keys

In this episode, I demonstrate how I use a plastic ruler, wood craft stick and ballpoint pen as if they were keys on a thumb piano, aka mbira or kalimba. Basically, I hold each object down on a wood table with one hand and pluck one end of the object with the other, moving ruler, craft stick and pen forward and back as a way of shortening and lengthening each "key."