CD BUBBLE
When you buy a stack of recordable DVDs or CDs, there's always one clear disc on the top to protect the top disc. Apparently, if you take that clear plastic disc and melt it just the right way, you can blow on it and make a kind of bubble. I experimented with it today at "work" with my summer assistant. On the disc you can see 3 other attempts that failed. We also tried on two other discs so this was something like the 12th try. We were very happy.