Challenge ideas

I thought I'd post a few ideas here for my self imposed 'challenges' :) I haven't picked one for this week yet, its been crazy busy. Hopefully it'll calm down enough so I can write!

• Temples: how many, how do they work, what are they like, what is their purpose, etc.
• The Elements: this one...is tricky. I still haven't decided yet if I want to use four, or five Elements. I also haven't decided yet (and probably won't til the time comes) if this will be one challenge, or four/five. As of right now I only have the basics down for each one, and I want to go more in depth.
• ...ok, so I only have two ideas on the books right now. More to come!

Cheers, and happy writing.