I'm sure that a lot of teachers have heard of this awesome website by now, but if you haven't, you should check it out immediately! Sqworl lets you compile a list of websites and creates a thumbnail for each site. You could make a Sqworl for kids, a Sqworl for favorite blogs or teaching sites. You can pretty much do anything your little heart desires.
Here is the Sqworl that I created for my students. Enjoy!