Well I'd go with reading a book or doing a math problem (or a puzzle, or drawing, or playing an instrument, or having a stimulating conversation) if anything it just makes life a bit more expansive...and interesting?
Bostonian, I found myself reading through some Pearson college guides at the library today. Have never done that. Very interesting. Would not have occurred to me to peruse at this point if not have been visiting this site. DD too young of course but the whole thing was quite fascinating.