Answer:
I am the minerals vital for your good health.
I can point in every direction but can't reach the destination by myself. What am I?
To you, rude would I never be, though I flag my tongue for all to see. What am I?
I am seen in the water. If seen in the sky I am in the rainbow a jay's feather and lapis lazuli.
Forward I am heavy backward I am not. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?