Do you want to expand your knowledge, travel without leaving home or a number of classes that grab your interest.
iTunes U offers an extensive selection of free non credit courses from top rated universities. No stress, go at your own pace, courses are complete flexibility.
iTunes U also offers hundreds of free Podcast on any subject you can imagine. Take a trip around the world. I love Podcast, reading done for you. The system can configure automatic downloads, has bookmarks, and keeps track of what you’ve listened to or not.
Courseca.org offers over hundreds of free on-line courses from top universities. No stress, work at your own pace. Drop a course as I’ve done several time. They also offer for fee courses Corsica.org range of subject matter is impressive.
Berkley School of Music offers a limited number of free on-line courses.
I hope you find something interesting, maybe even something you can do with the kids.