The @rt Room (nice site for working some art history or music appreciation into a child's world)
www.arts.ufl.edu/art/rt_room/

All Music (terrifically comprehensive music site)
www.allmusic.com/

Andante (classical music resource)
www.andante.com/

Archive of Misheard Lyrics (just what it says, and very funny)
www.kissthisguy.com/

Art and Culture (just what it says, and lots of it)
www.artandculture.com/ACSniffer/index.html

Art and Letters Daily (get your daily quotient of culture and news from this online broadsheet)
www.aldaily.com/

Art Museum (virtual art galleries, with an emphasis on classic art by the Olde Masters, but with plenty of new and computer art on display as well)
www.artmuseum.net/

Basil Gogos (artist who gave us many of those wonderfully awful Film Monsters magazine covers)
www.basilgogos.com/

The Blue Flame Cafe (interactive blues music site)
www.blueflamecafe.com/

Craft Town (resources for crafters)
www.craftown.com/

eFestivals (British music festival site)
www.efestivals.co.uk/

Emplive (online site of Microsoft co-founder Paul Allen's interactive rock&roll museum)
www.emplive.com

Ephemeranow.com (site dedicated to the advertising and illustration art of mid- century America)
www.ephemeranow.com/

George Harrison: All Things Must Pass (well-done biographical and musical site by the late ex-Beatle)
www.allthingsmustpass.com/

International String Figure Association (learn string art)
www.isfa.org/

Joseph Wu's Origami Page (great site for those interested in this ancient art form, with info for both novices and the experienced paper folder)
www.origami.vancouver.bc.ca/

King Crimson Home Page (my favorite rock band)
www.king-crimson.com/

Musi-Cal (obscure listings of smaller, less promoted music festivals across North America)
www.musi-cal.com/

Music Links for Kids
www.athropolis.com/links/music.htm

Museum Kids (Metropolitan Museum of Art kids' page)
www.metmuseum.org/explore/museumkids.htm

National Gallery of Art Kids' Page
www.nga.gov/kids/kids.htm

National Public Radio (streaming broadcasts, news, commentary, opinion, and music)
www.npr.org/

Newsarama (comic book news and info hub)
www.newsarama.com/

Official Janis Joplin Site (well-done tribute site)
www.officialjanis.com/

Paperfolding (great origami site)
www.paperfolding.com/

SewNews (offshoot of the monthly sewing magazine)
www.sewnews.com/

Ultimate Band List (go here for all your music info needs)
www.ubl.com/

Yiddish Radio Project (site that compiles and provides Yiddish broadcasts from the '30s, '40s, and '50s)
yiddishradioproject.org/

More to come...