to feel without seeing

Well thursdays class exercise made me realize it's really hard to feel something that isnt there. At some points during the exercise I did actually feel like I was touching sand or touching playdough but other times it was very difficult and I got frustrated. i dont know if it was easy for all of you but I had a hard time with it. Once I did actually feel it, it was cool to think that I was touching something that was physically not there. I think this class is definitely teaching me alot about making me appreciate my senses that I have.