A science teacher asked her students "Children, if you could own one mineral what would it be?"

One boy said, "I would choose *gold.* Its worth lots of money and I could buy a *Corvette."*Another boy said "I would want* platinum *because its worth more than gold and I could buy a* Porsche."*

The teacher said, "Johnny, What would you want?"

Johnny said "I would want* Silicone."*
"Why would you want silicone?" Asked the teacher.

"Well my mom got some, he replied. And there's always a Porsche or Corvette sitting in our driveway!"