If you could invent anything, what would it be?

Question: If you could invent anything, what would it be?
- Keywords:
  create,
  device,
  fun,
  invent,
  invention,
  machine,
  object,
  thing
Asked by katiearis to Amelia, Jim, Liz, Prateek, Richard on 20 Jun 2011. This question was also asked by charleypoolton.
- Lizzard O'Day answered on 20 Jun 2011:
  
  Cure to cancer. Cancer hurts too many people and I’d like to help get rid of cancer once and for all.
  
  I’d also like to invent a teleportation device more often than not I need to be in two places at once and I think a teleportation device would come in very handy.
- Amelia Markey answered on 20 Jun 2011:
  
  Definitely the tricorder from Star Trek. Being able to just scan a person and instantly see what’s wrong with them…I bet a lot of doctors wish they could do that!

Question: If you could invent anything, what would it be?