My parents gave 6yr old DS a copy of the BBC Walking with Dinosaurs CD. So far DS and 2 friends have watched it most of the day. DS#1 and his 12 yr old mates were glued to it yesterday afternoon. All 3 of my DC were watching it last night. Totally engrossed.
Have ordered Walking with Monsters too.
Perhistoric nightmares make excellent babysitters it seems