This is just an idea for a stroke sensor, based on Plusea's great stroke sensor tutorial: https://www.instructables.com/id/Stroke-Sensor/
The end result is quite cute without losing its effectiveness. For this experiment I used Shieldex 235/34 dtex 2-ply HC thread, which is quite thick. Be careful when choosing your thread: its thickness should depend on how long you want your tassels to be, as well as their final use. In this case I wanted to have short tassels that stuck out instead of hanging down because I was making them for a stroke sensor, so I chose this thicker thread. This also helped give the tassels a little more body.