I Can Has Cheezburger, I Has a Hotdog, My Food Looks Funny, all the sites listed under "cute",and the FAILblog (using the convienient G-RATED ONLY filter) are all kid-friendly. Also, on the site, it did not say Friends of Irony was appropriate, but so far I have had no problems with it. Though they may look fun, So Much Pun, EngrishFunny, Bob's House of Videogames, and Graphjam are not kid-friendly.