For me this was really fun to do,it was the first art project that I had to work on with a partner and I was very happy with the outcome. It might be hard to tell but there are little tiny (pain in the butt) glass beads inside the tubing you see. And if you squeezed the stoppers on each end it would send the beads through all the different loops in the tubing  Super fun to do and glad I had such a great partner in crime to do it with.