Common in sports, it’s usually round. You can kick it and throw it or toss it around. They make ones for stress that you can squeeze. And another word for a certain kind is testes.

I'm selling my car. It's in excellent condition, and it has really low miles because it was only driven from time to time. What kind of car am I selling?

Oh, my stars! Where wheels greet the home, a path where tire treads roam. A welcome mat for all on four, leading straight to your front door.

Some compete to claim me, Some wear me out and about, Draw your lips together, And you’ll figure me out.

There once was a large prickly fellow, Who stood, arms up, in sand so yellow. 'I hold fresh water within, but protected by my spiney skin. So don't touch me or loudly you'll bellow.'