Why so many people want to go back to childhood?

I will choose this topic for my English forum topic.

 yea, why do I choose this topic, that's because that one day night I had a dream, in which I'd been back to my childhood. So many many things came back to my mind(rose before my eyes).

 

Why ?

1. For living:

    Buy house, bring up child, taking civil exams

    may show a lot of pics for demenstrating this view

 

2. Back to child：

    a limpid childhood

    carefree and happy and lighthearted

  Although we had no such rich enjoys nowadays, we lived without worring

 

 

So pressure for living:

Civil servants test:

http://news.cn.yahoo.com/newspic/news_newspic_article.html?id=2493&pg=1#newspic