I took piano and violin through sixth grade, and then stuck to just piano through college. Sang chorus in elementary school and had decent pitch until my voice broke. Now even though I can hear the notes in my head, when I sing the pitch is all over the place! It's embarrassing and now I only sing for my undiscerning and loving children.
I wasn't really into music, but did it for my parents. I won't push music onto the kids, but if they express interest... then sure, they can take classes.
Did you take any music lessons growing up? Do you want your kids to?