Everything is new

For me , this is an unimaginable experience. Everything here is new.
The most difference here beteewn my country is in United Stated ,every student are so independence. Few days ago, i went to Wal-mart with my host family. When my sister wanted a poster , she said to Mum, could you please pay the bill me , I haven't bring enough money today. I 'll give back to you after back home. On that moment ,I feel so suprised. Because in my country ,when the child wants something, the parents usually will buy it . It seems as a  routine that everyone knows. As the child ,at least for me ,I never think about I need give back to my parents when they but something to me .Maybe this is depend on different cultural.