I have a group (playing 3.5e) which I DM for two years now.
They never missed a meeting, and are always eager for more.
The problem is - they are very, and I mean very good players (roleplaying and rules knowledge\usage).
It gets to a point where I find it really difficult to challagne them. I don't have a lot of prep time (I have 2-3 hours a week - I have 2 kids, a wife and a Masters degree to work on, plus a day job
), and my familiarity with all 3.5e non-core stuff is not that good. On the other side, all the players are very familiar with all the books, and get wonderful ideas out of them.
Any advice?
(Note that they are not overpowered in the sense of magic items etc. They did use 'builds', but I get the feel that their strenght is in the scope of their knowledge of the rules, i.e what is the best combination of spells to overcome any given problem, or what tactic is very effective againts certains types of creatures - after they identified it using Knowledge skills etc)
They never missed a meeting, and are always eager for more.
The problem is - they are very, and I mean very good players (roleplaying and rules knowledge\usage).
It gets to a point where I find it really difficult to challagne them. I don't have a lot of prep time (I have 2-3 hours a week - I have 2 kids, a wife and a Masters degree to work on, plus a day job

Any advice?
(Note that they are not overpowered in the sense of magic items etc. They did use 'builds', but I get the feel that their strenght is in the scope of their knowledge of the rules, i.e what is the best combination of spells to overcome any given problem, or what tactic is very effective againts certains types of creatures - after they identified it using Knowledge skills etc)