whats you favourite invention? mines the tesla coil!!

Question: whats you favourite invention? mines the tesla coil!!
- Keywords:
  history,
  invention,
  preference
Asked by geobullet to Colin on 18 Jun 2013.
- Colin Dick answered on 18 Jun 2013:
  
  I think I’ve been badly affected by all the talk of electricity lately, buy my favourite invention is the solenoid. Simple yet effective!

Question: whats you favourite invention? mines the tesla coil!!