It's good to buy something your child wants.
John has a young daughter.
John wants to get his daughter a birthday present.
John asks his daughter what she'd like for her birthday and buys it.
John asks a neighbor what to get his daughter since he doesn't know her well.
John's daughter is happy and feels like her dad pays attention to her.
John's daughter doesn't like the present and is disappointed since it shows her dad doesn't know her at all.