I got only as far as the potentiometer because I think the one I have is faulty! Will need to pick up a new one... but I hooked it up all right!
Overall, these labs have been refreshers for me, except on a different Arduino which has been a fun learning process. I think the labs are presented in a way that is hard for me to think of creative applications.
Certainly, the potentiometer acts as a dimmer for the light, but I would be interested in using a speaker and using the potentiometer to control volume. The question here is where the sound input comes from...