What is a hydrant flushing?
The sun contains over 99% of all the mass of the solar system. No planet is orbiting around Jupiter and is called a planet. Only Jupiter's moons orbit Jupiter.
I don't think you're familiar with the piercing process. The purpose of a hollow needle is to make a hole larger than the jewelry you are putting in. They pierce you with the hollow needle, insert the jewelry inside the needle (that's why it's hollow) and slide the needle out, leaving the jewelry in place. Your intended method would be to make a tiny little hole with a safety pin and shove a larger gauged piece of jewelry in there, assuming the hole doesn't begin to close and you can even find it. Won't work.
A it lists kart tracks by state, and you should be able to find links to local kart clubs from there. Check local club websites for classified ads. Expensive sport. But the most fun you'll ever have in your life.