I love using screensavers togenerate thought and wonder and there are some excellent screensavers out there.
A couple of days ago I discovered ‘Cities’. Cities is an animated Earth that lights
up the major cities of the world and displays the local time and population down the right hand side.
Cities is great for leaving on your laptop and then demonstrating wonder to the kids when
it kicks in ie ‘Gee, I wonder what’s in………….
?’ 
and then go off to find out.
Check out a few of the screensavers I use in my classrooms.
cheers
Adrian
PS If you sign up for BOINC to look for ET you’ll have heaps of questions hehehehe