Answer:
I am there when you sit, but gone when you stand. What am I?
I am a seed with three letters in my name. Take away the last two and I still sound the same.
Used left or right I get to travel over cobblestone or gravel. Used up I vie for sweet success used down I cause men great duress.
I have a head tail but no arms and legs.
I twist and turn and leave a loop. What am I?
What bird can lift the heaviest weight?