What are those blue glowing stone objects for?

Question

I'm now halfway through the game and have seen several of this objects you see in the screenshot. They don't seem to be there just for decoration purposes, but I also haven't found anything I could do with them.

Will you be able to do something with these objects, or have I already missed something? Or are they just there to confuse me?

Answer

You break them with the hammer, and they drop experience orbs.

Check more discussion of this question.

How do I get past the giant snake in Trine 2?

Question

I'm stuck at the giant snake (first boss) in Trine 2. Any ideas?

Answer

Climb the steps on the left and the snake will try to bite you.

After the second time, the cave should collapse.

Check more discussion of this question.