I guess you had a pretty easy undergrad experience. I was easily working 80 hour weeks throughout college as an art major. The tough part of an art project is it’s never really done, and your work is expected to be flawlessly executed. I’d never had as much free-time then as I do now. Taking care of the kids is just how you chose to allot your time, no need to feel like you missed out on something else because of it.