What’s the best thing to put in liquid nitrogen?

Question: What's the best thing to put in liquid nitrogen?
- Keywords:
  liquid nitrogen
Asked by Miab12yr7 to Imogen on 10 Mar 2015.
- Imogen Napper answered on 10 Mar 2015:
  
  A banana!!!!
  
  If you put a banana in liquid nitrogen it freezes! It becomes so solid that you can use the banana as a hammer!
  
  Take a look at this video!

Question: What's the best thing to put in liquid nitrogen?