What Am I Riddles

Question: Four hang, four sprang, two point the way, two to ward off dogs, one dangles after, always rather dirty.

What am I?

Question: What goes up, lets out a load, then goes back down?

Question: What am I?

Question: These are the three lives of mine:
So gentle I soothe the skin,
So light I caress the sky,
So hard I crack rocks.

What am I?

Question: I'm red, blue, purple and green.
No one can reach me, not even the queen.

What am I?