you might have seen last year's video of kids visiting valve and creating portal 2 test chambers in the name of science education. (which gave us the temporal free portal 1). In case you don't:
video of last year
http://www.youtube.com/watch?feature=player_embedded&v=QGQo0z3XikI
This year valve continues through STEAM for SCHOOLS, the school-friendly version of valve's game distribution service; access lesson plans and unique puzzles; and join a teachers-only community forum to share experiences.

for more info: http://www.teachwithportals.com/

now you're learning with portals.

tesselode wrote:
Did anyone else scroll back up to see if the cube would come out the blue portal when it went into the yellow one?

?

chickenmobile wrote:
tesselode wrote:

Did anyone else scroll back up to see if the cube would come out the blue portal when it went into the yellow one?

?

The background is an animation. Every once in a while a cube falls through the floor portal and comes out the wall one.