How do distortion mirrors work (like to one you look in a small child)?

Question: How do distortion mirrors work (like to one you look in a small child)?
- Keywords:
  mirror
Asked by soggysheepy to Andrew, Janey P, Kinda, Ravi, SarahJane on 20 Jun 2013.
- Andrew Manches answered on 20 Jun 2013:
  
  They are curved so they bend the light that reflects back at you. They can angle the reflections together to make you look smaller or reflect them further apart to make you look bigger. If you ever find a bendable mirror (even tin foil) you can experiment to see how.

Question: How do distortion mirrors work (like to one you look in a small child)?