I try not to let other peoples' work influence my own, but when I saw 's little dice dragons a while back, I was really thrilled and inspired. Dragons and dice together - it's perfect! D20's are such an awesome shape, but I thought that the regularly sized dice were just a bit too big for my dragons. After a really long time of searching, I managed to get my hands on some adorable mini dice - I think they are about 60% the size of standard dice... and they are JUST the right size for my dragons to hold. Win!
Also, I am always forgetting to take pictures that show some sense of scale, but this time, I remembered to include a quarter! Most of my dragons are about the same size (approx. 2 inches tall), so this image is a good reference of scale.
This dragon has been sold, but you can still see additional angles at my Etsy.
I follow the directions on the package - most of the time, it's 275 degrees, and 15 minutes per quarter inch of thickness. I usually bake mine for 25 minutes and they come out fine - I think the temperature is more important than the length of time, when it comes to preventing scorching.
350 sounds a bit high. I recommend checking your clay's baking instructions - some of these clays can release toxic fumes when they're baked under too high a temperature! >_<
I use oven-bake polymer clay. It comes in lots of pretty colors and can be baked solid in your home oven. My favorite brand is Premo Sculpey, but I also use some of the Sculpey 3 specialty clays. I usually get mine from Michaels, but any crafts store should sell it - just ask the next time you're in one!