Continued from previous post) However, at the scene of knitting, she had a difficulty after she through the yarn zigzag, even though she started to work very smoothly. I immediately realized that while they are knitting, they could not do two things that reading the instruction and knitting at the same time. This is maybe because I was there and had a conversation, or maybe not. In fact, there was another problem that she mistook at knitting process and she tried keep working, but she had a difficulty later because of that. At this point, I should note that they could go back to fix the problem and keep going after that in the instruction. User testing gave me very important feedback and study. There must be unexpected things from users. I will develop my prototypes and go to the next testing.