Dinosaur bones? Or freak rock formations?

I found these rocks, wouldn’t it be cool if they were dinosaur bones? Dinosaur bones from the Jurassic period – just joking, if anything they would be late Pleistocene. (Click on images for full size):

This looks like this egg found in China:

This looks like the head of a femur, and it even looks like something gnawed the bone:

This looks like an egg cut in half, and it almost looks like a skeletal embryo inside: