Screenplay or child's play?

When we were all told that we would have a chance to take a part of the book and write a screenplay I was excited. I was excited to the point where I thought that writing a screenplay might be easy. How hard could it be? I went into the exercise thinking, just take any part of the book and put some action to it and there you have it, a screenplay. Well needless to say, that was not the case. When we got into our groups I could see that it was going to be harder than I thought. We all thought we had a part of the book that would be interesting and easy to write about. We were all wrong. It started out fine and we all thought we had a good start, but as it went on it got harder to keep it going in the right direction and keep it interesting. As our screenplay went on it kind of fell flat and boring. When the exercise was over I realized that writing a screenplay is not child"s play, and is a whole lot harder than I ever imagined.