I got my peoples to start digging but now all my builders are dead. The people with no building skill won't dig and I have no projects to train some people in the building skill.

Any suggestions?

If the scaffolding is still there, you should be able to train new builders using the debris left on the beach by an Island Event (one should come along sooner or later) and then continue work on Puzzle 12.

Alright, so the only way to start it again is to wait for some debris and train a builder?

And also, the puzzle with the boulder is not working. My golden child just doesn't seem to want to move it. She's been running around as a 5 year old for 3 generations and hasn't moved it.

Other than waiting for debris, the only other way to train builders once all of the construction projects are finished is to start a new game. That situation is being worked on in an update to Village Sim, but it's still in development and a release date has not been announced yet.

There have been rare reports of it taking longer than a week for the Golden Child to take care of Puzzle 11. I have never had to wait more than a day, but I tend to leave my game running with my Palm on AC power when it's time for that puzzle - it seems to happen much faster that way.

Alright, I'll have to leave the game on my Treo on overnight then.

I cannot seem to get the 12th puzzle. Any hits?

There are a number of ways to get all the help you need on any of the puzzles. This post has the details.