It depends on what they are doing. My sprogs could spend every hour of the day playing Mario Bros (if I let them - I don;t). Try and get them to do much else does result in the 'I'm bored' line (so I have to force them - which usually results in them being pretty happy eventually!). I wonder why video games have such a hold?
In other news, is it still £250? Still too expensive then, even for Shaun the Sheep, in 3D.