http://vimeo.com/41338566 By architecture students of ETH Zurich.

http://vimeo.com/40768045 By Sampo Rask.

http://www.youtube.com/watch?feature=player_embedded&v=Fcg9cCQKGJY By avemagnadude.

http://www.youtube.com/watch?v=NRN8VODdlzA By Kiril Viktorov.

Two IMMENSELY popular Blender videos for kids.

http://youtu.be/GN8KgwGAySE By the AgenZasBrothers (we've published their showreel last year).

http://www.youtube.com/watch?feature=player_embedded&v=rAm1sTfso74 By steveomaticmaniac.

http://www.youtube.com/watch?feature=player_embedded&v=7HFP-d5Mnz4 By Ant Farm.

http://vimeo.com/40628974 By Reynante M. Martinez.

http://www.youtube.com/watch?v=0hF09YMnuKg&feature=youtube_gdata By Tom Walks