Answer:
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
Sometimes dark and sometimes bright, I make my way among twinkling lights. Seas and oceans obey my call, yet mountains I cannot move at all. What am I?
I carry you down a gentle stream.
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?
I can wave my hands at you but I never say goodbye. You are always cool when with me even more so when I am high!
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk