If you had to choose one invention to take with you on a desert island, what would you choose?

Question: If you had to choose one invention to take with you on a desert island, what would you choose?
- Keywords:
  desert island,
  invention
Asked by Pineapples :3 to Will, Lulu, Fahim, Chris, Candice on 12 Nov 2019. This question was also asked by x...boomitsgrace...x.
- Lulu Buford answered on 12 Nov 2019:
  
  Probably a saw or a battery powered saw to cut some trees (wood) to build a raft for when I wanted to leave!

Question: If you had to choose one invention to take with you on a desert island, what would you choose?