Can someone please tell me what Reverse Psychology means?
Suggesting to do something by someone that you don’t want him/her doing it or vice versa.
For example I don’t want to eat my vegetables I will say to a child that this vegetable is so yummy and maybe his mother won’t allow eating it because it is so sweet. When the child eats that vegetables you just did a reverse psychology.
Mother’s are masters at this. 
The world famous mother’s guilt trip is a fine example of using reverse phychology.
I have to agree with that. Everytime I want to play outside my mom would say “OK…” and then I feel worried and end up staying at home. Haha.
Yes, to do it effectively it must use tone of voice, body language and a subtle simple command of the language. Oh and let us not forget the eyes… proper use of eyes can make or break the whole thing. 
It’s unfair! Kids need to revolt!
Propaganda.
They can’t, it has something to do with an invisible umbilical chord that mothers and children have between them. 