Answer:
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
You bind me and I walk. You loosen me and I stop. What am I?
When I am alive, people sing. When I am dead, people clap hands. What am I?
What gets bigger when more is taken away?
I am a seed with three letters in my name. Take away the last two and I still sound the same.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?