In this playtest, I brought the no-tech version of my prototype. I want to test that if the current form is appropriate to iterate. I found that even though I replace all the pegs with the keys of Kalimba, it doesn't make the sounds I expect. The first reason is that there is no cavity in the structure. Besides, the keys are too long for the users to knit. However, the good thing is the instruction is very obvious so that users know how to interact with it. So for the next step, it might be better to make a technical prototype directly.