It is a natural thing for teenagers to dream. They don't have much liabilities and burden at that stage of life so they are free to dream. It is a part of their life but sometimes these dreams are impractical and non-realistic and when they are shattered, they cause a lot of pain.
In the story 'Going Places', the author has described the feelings and dreams of a girl, a school-going teenager Sophie,. She was a day dreamer and fantasized that she had met with Danny Casey, a football player from Ireland. She dreamt of having met him twice in the arcade. For her, he was a hero to be worshipped. She went to the place where she thought he would meet her and when he didn't turn up, she felt disappointed.
Then she thought of owning a boutique, becoming a manager, a fashion designer or an actress irrespective of her weak socio-economic status. She had not thought about where the money would come for opening a boutique. She was blind to the bitter truth of life. She dreamt of an imaginary life, full of beautiful things. It can be said that she wanted to lead a lavish and grand life which was not possible. She was over ambitious. Her dreams were unrealistic in the sense that ultimately she would have to work in a biscuit factory.