All of the Saw movies are terrible. Granted, I haven't seen the third, fourth, or fifth, but the first two were god-awful. The third, fourth, and fifth sequels of GOOD movies are terrible, so I can't imagine Saw is any different.
If you kids are ready to grow up you can forget Saw and watch some heavy duty stuff, like Irreversible. Not that it's horror exactly, but let's face it, Saw is just shock BS and not horror.