This was our thought, as well. Chem. Eng. is a tough route, and engineering generally doesn't offer much chance for fun electives. We're not rushing him to graduate college early--dual enrollment was his idea, not ours. So, have a good time and learn something fun (to you). I also think it's good to exercise different parts of the brain.
Funny story, since this is such a "potpourri" thread--DS17 came out of calculus all excited the other day--a girl in his class had flags of Honduras and Kyrgystan on her backpack! It turns out, she has a parent from each country--and she happened to run into the only person, probably in our entire city, who could identify both flags by sight. I mean, I could maybe get Honduras...maybe...given enough time...and google.