I have lots of limbs but I never walk. If you saw me, I'll fall over. What am I?

What is many days long but doesn't sound strong?

Nature’s yellow marker. With floating seeds. It sounds like a character from a Caribbean kids show, about the king of the jungle.

I’m made of steps, yet not your feet, I grow with every mile you meet. No single place can call me home, I’m what you take each time you roam.

I originated in the outback. No matter how hard you throw me, I always come back.