I also did it some time ago where I showed two of my classmates my bitcoin wallet then the amount inside it as well as its price in my local currency and as usual they get curious too and asked how is it considered as a money or how it can used to buy some stuffs and how can I convert it into cash . I explained to them how can bitcoin works and how it can be used as a medium of exchange or payment, why it has a value and lastly how am I earning it .
If you want to encourage peole to try Bitcoin the nest thing to do is to show them the way you do to earn bitcoin because in that way you may passively give them avreason to try on dealing with Bitcoin. And after that widen their knowledge about Bitcoin by introducing them bitcointalk where you may tell them how to earn using signature campaign and how they can speculate their ideas in regards to Bitcoin in order for them to develop as an individual.